|Human Partner||Mochizuki Meiko|
|Voice Actor||Morishita Yukiko (森下 由樹子)|
|Baby II||Meicoomon's Unnamed Baby Form|
|Child||Meicoomon's Unnamed Child Form|
|Perfect||Meicrackmon: Vicious Mode|
Ordinemon (with Ofanimon: Falldown Mode)
Meicoomon is a terse talker, rarely speaking and even then only in short sentences. She cares deeply for Meiko, however, and is very dependent on her, even more so than other partner Digimon. She is very shy and easily frightened, depends on Meiko to calm her down and make her feel safe, and feels lonely and miserable if she cannot find Meiko. Despite being an Adult-Level Digimon, Meicoomon acts very childishly, often wanting to play and eat sweets with the other Child-Level Digimon. She can also be very naive and ends up causing trouble. Like Meiko, she speaks with a Chugoku accent.
Meicoomon is also known as the Libra, a Digimon who possesses an unknown and unstable destructive power that is triggered by her fear and pain. When she is scared or provoked she enters an unnamed, vicious form and becomes very wild and savage, acting out of an instinct to protect herself from everyone and everything. The more scared she is, the more powerful she becomes, to the point of causing her to evolve. Meiko was once able to calm her down from this state, but in the events of tri. Meicoomon never responds to Meiko's attempts to help her, although she still recognizes her and occasionally tries to protect her.
According to Huckmon, Meicoomon's incredible power comes from possessing a shard of Apocalymon's data, which Huckmon describes as the "dark side of the Digital World". Her presence causes digital data, expressed in binary (i.e. 0s and 1s), to be overwritten and converted into ternary (i.e. 0s, 1s, and 2s). Since this is not how Digimon, the Digital World, or the computing systems used by humans are meant to operate, this creates distortions, turns Digimon into Infected Digimon, and disrupts digital and electrical systems. Meicoomon does not seem to be aware that she is doing any of this, though. Because of her power, Meicoomon is hunted by the servants of Yggdrasill, who wants to exploit her powers for its own purposes. The servants of Homeostasis try to prevent this.
Huckmon claims that Meicoomon was once feared in the Digital World for its tremendous partner and was outcast. Years before the events of tri. began, Meicoomon and Meiko first met when the Mochizuki family lived in Tottori. The sound of a Digivice lured Meiko into the woods, where she found Meicoomon in the woods and received her Digivice. Meiko's father, who works as a researcher of Digimon, conducted tests on Meicoomon, but on one occasion accidentally provoked her into her feral state, which Meiko calmed her down from. Having Meiko as a partner to keep her calm also kept Meicoomon's power in check for a few years.
At the start of "Reunion", the Mochizuki family has moved to Tokyo but Meicoomon is separated from them. She searches Tokyo to find them, oblivious to Huckmon following and watching her. At the end, she is reunited with Meiko when Alphamon emerges into Odaiba, looking to capture Meicoomon. The other Chosen Children drive Alphamon off, and Meiko and Meicoomon are welcomed into the group when Meiko introduces herself as a Chosen Child and thanks them for their help. Meanwhile, Himekawa Maki has obtained surveillance of Meicoomon in action without anyone knowing.
In "Determination", Meicoomon starts to bond with the other partner Digimon when she and Meiko join the other Chosen Children on a trip to the Ooedo Onsen. Meicoomon being new to the Real World, ends up getting lost along with Piyomon in the men's bathroom. Later, Meicoomon attempts to aid Togemon in fighting off an infected Orgemon who invades the real world through a distortion, but fails to do much to him and is saved when Leomon appears and takes Orgemon back into the Digital World. Meicoomon, the other partner Digimon, and Leomon visit the festival at the Chosen Children's school, but while there Meicoomon is abducted by the Mysterious Man (disguised as the Digimon Kaiser). Leomon, Palmon and Gomamon rescue her from the Mysterious Man and the Imperialdramon that he commands, but after being rescued, Meicoomon is terrified by a brief fit of madness that Leomon has. She enters her feral form and kills him, then runs away into a distortion.
While she is on the run in "Confession", Meicoomon accidentally causes instability in both worlds that threatens to provoke a Reboot. The Chosen Children track her down and attempt to stop her to save both worlds from the infection and the Reboot, but their Digimon attacking her provokes her fear even more and causes her to evolve into Meicrackmon Vicious Mode. She evades the partner Digimon's capture, turns most of them into Infected Digimon who assist her in trying to escape, and triggers the Reboot countdown, but is stopped when Tentomon evolves into Herakle Kabuterimon, captures her, and forces both her and his infected friends back into a distortion so that the Reboot erases all traces of the infection she caused.
After the Reboot, however, Meicoomon is the only Digimon who retains her memories of her pre-Reboot life, and she continues to search for Meiko in the Digital World. In "Loss", she begins to grow resentful and bitter and feels as if Meiko hates her and has abandoned her, even lashing out at Meiko when they meet again. However, Meiko pushes through this and reconciles with her briefly before the Mysterious Man appears and tries to take Meicoomon away. When Meiko and Meicoomon are separated from the other Chosen Children, the Mysterious Man attacks Meiko and severely wounds her, provoking Meicoomon to evolve into Meicrackmon Vicious Mode again and beginning another rampage.
In "Coexistence", Meicrackmon flees into the real world, where her powers have very destructive effects. Because of this, Homeostasis decides that Meicoomon has become too powerful and must be destroyed, and that the Chosen Children are not up to the task and must no longer interfere with Homeostasis's will. The Chosen Children corner Meicrackmon in Tokyo and attempt to calm her down, but her fear of the eight partner Digimon, all evolved to the Perfect level, makes her even more powerful, and when Jesmon arrives to kill her, she is terrified even further to the point of evolving into Raguelmon: that is, exactly what Yggdrasill and the Mysterious Man wanted to happen.
Raguelmon fights a long battle against Omegamon and the other Ultimate-level partner Digimon (fighting to save her), Jesmon (fighting to destroy her), and Alphamon (fighting to capture and use her), and is slowly worn down by all of them. Meanwhile, Meiko begs the Chosen Children to kill Raguelmon and put an end to her suffering, but after Alphamon's arrival and Jesmon's failed attempt to destroy her with Un Pour Tous, both Raguelmon and the partner Digimon are worn out and left unable to do anything. When Hikari's grief at the outcome of the battle Dark Evolves Nyaromon into Ofanimon: Falldown Mode, the Mysterious Man forces Ofanimon and Raguelmon to fuse into Ordinemon, beginning the collapse of the harmony between the real and Digital Worlds.
In "Our Future", Ordinemon is manipulated by the Mysterious Man to cause the desctruction in the real world, while the Chosen Children try to find a way to save both Meicoomon and Tailmon without harming them. After Meiko's digivice is unlocked, Ordinemon begins suffering a dissociation and Jesmon manages to save Tailmon, but Ordinemon is then restored by Yggdrasil. She is finally defeated by Omegamon Merciful Mode. Meicoomon is then purified, saying farewell to Meiko and vanishing away. It was recently revealed that the sound of a Digivice after the ending of "Our Future" indicates that a Digimon was born, probably Meicoomon.
Meicoomon appears in Digimon World: Next Order and is found in the Nigh Plains, unaware of how she managed to reach this world, whilst suffering from amnesia. She tasks Takuto/Shiki to defeat a scary looking Digimon, that had chased her out of the forest. Takuto/Shiki then confronts said Digimon, a Growlmon (Orange) who attacks the tamer's partners after learning they're friends with Meicoomon. After being defeated, Growlmon explains that Meicoomon was lost, hungry and upset and that he had just been trying to help her out, only for Meicoomon to misunderstand and attack Growlmon, knocking him out, stealing the food he had brought her and then fleeing in fear from the scary looking Digimon. Growlmon then leaves the forest, not wanting the tamer to bring their friend to attack him again. Once Meicoomon is informed that Growlmon has left, several memories return to Meicoomon, who remembers it had been near a waterfall and a bridge, then tells the tamer to go find that vague location. Upon arriving to the Ohguino Wastelands, the tamer finds a scrap of paper, supposedly from Meicoomon's diary, which states that she has found herself in a new world and that she needs to get back before "they" find her. Immediately after reading it, three Pidmon arrive, surprised to see a human in the Digital World. When the Pidmon touch the diary page after enquiring as to what it is, it seems to affect trio, who then attack the tamer's partner Digimon. Upon being defeated, they state they must flee and report back to their master, then teleport away. The tamer relays back to Meicoomon that she is being targeted by the Pidmon, though before Meicoomon can react to this information, a Panjyamon, Sorcermon and Kyubimon (Silver) show up to confront Meicoomon. Meicmoomon proceeds to kill all three in one hit, then turns around and attacks the tamer's partner Digimon. After being defeated, Meicoomon regains her memories, apologises to the tamer and rewards them with an evolution crystal, that allows any child level Digimon to evolve into a Meicoomon. She is then called back to her world and disappears.
Later on, Jijimon tells Takuto/Shiki that something strange, likely a Digimon from another World, had been picked up in Mod Cape. They are sent to investigate, assuming that it is Meicoomon as the tamer had dealt with her before. Upon arrival to Mod Cape, the Agumon (Black) that usually roam on the ship are all knocked out. The tamer is able to wake them up, though they have no memory as to why they had been knocked out, or even as to why they are on the ship, showing thy all have amnesia. Once an antivirus is used on them they remember that they saw a strange looking Digimon, covered in a black aura and that upon seeing her, they all "started to feel fuzzy" and then blacked out. After helping the Agumons, the tamer is sent a message that the signal had now been picked at in the Infinite Cauldron. Once there, the tamer finds a Were Garurumon (Black), who had been defeated in less than 10 seconds. Once the tamer offers to help heal him though, he suddenly is cloaked in a purple aura and attacks the tamer's partners. After defeating the WereGarurumon, the tamer uses an anti virus on him which causes him to regain control of himself, then explains that a strange looking orange fuzzy Digimon covered in a black aura appeared, which caused him to feel fuzzy and he attacked it in self defence, only to be quickly defeated. The tamer is sent to Server Desert next where Meicrackmon: Vicious Mode is found, currently in the process of fighting and infecting Yukimura and Rikka. When Yukimura attacks Meicrackmon, Meicrackmon yells out that she will not forgive White Fang and teleports away. Luckily though, Yukimura had managed to gain a small amount of the purple aura. When Luche touches it, the aura is destroyed, showing that Luche is immune to it and is able to neutralise it. They come up with a plan for Tsuzuki Shoma to distract her, whilst Luche applies an anti virus made out of her DNA and whilst the aura is being neutralised, Takuto/Shikis partners swoop in to defeat her. The group finds Meicrackmon in the same place that Meicoomon had originally been found. The plan works and after being defeated, Meicrackmon regains control and realises she is back in this world and had caused trouble for everyone again.
She informs the group that Mochizuki Meiko was kidnapped by a group known as the "White Fang", who intended to use Meicoomon for evil. To stop this, Meiko intentionally fell into a trap intended to catch Meicoomon. When Meicoomon attempted to rescue Meiko, the White Fang used a machine that caused Meicoomon to evolve to Meicrackmon Vicious Mode. They then used it to send her to an alternate universe, that being the universe of Digimon World: Next Order. Dimension hopping caused Meicrackmon to get amnesia, making her go berserk. She claims it was a coincidence that she ended up in the same dimension as before, though theorises that she may have been subconsciously asking Takuto/Shiki for help as they had helped her in the past, leading her to this dimension. Meicrackmon manages to return to normal and then uses her powers, alongside her bond with Meiko, to return to her original world, then proceeded to defeat the White Fang, freeing Meiko. When the trio return to Floatia, Meicrackmon has reverted back to Meicoomon and is waiting for them. She states that her power is now mixed with Luche's DNA but that otherwise she isn't sure as to what is going on but that he dark aura no longer exists inside her. Shoma then shows her around the village, as she decides to stay around for a while. Meicoomon then rewards the tamer with a crystal that allows any Adult level Digimon to digivolve into Meicrackmon: Vicious Mode. Whilst in the City, Meicoomon requests to see a different Digimon every day and should Takuto/Shiki show her the Digimon she requests to see, she will reward them.
The events are identical to the original Next Order.