Meicoomon

Meicoomon is a protagonist-turned-antagonist in Digimon Adventure Tri. Meicoomon resembles a feral cat-like creature. She has two scarf-like hairs and her irises of her eyes resemble plus-signs.

Mutated
The mutated form of Meicoomon resembles a much more fiercer version of herself. Her claws are long, her fur is shaggier, and has shining eyes.

Meicrackmon Vicious Mode
Meicrackmon Vicious Mode is the corrupted Ultimate form of Meicoomon. She resembles a much more humanoid version of Meicoomon. She has hand-like paws and purple claws.

Raguelmon
Raguelmon is the corrupted Mega form of Meicoomon.

Determination
Meicoomon and Meiko join the Digidestined to solve the mystery of the infection, but Meicoomon turns herself into a much more savage form and kills Leomon.

Confession
It was revealed that Meicoomon was responsible for the cause of the infection of Digimon, and she attacks the Digidestined’s Digimon Partners, and later Dark Digivolved to Meicrackmon Vicious Mode and fights the Digidestined and their partner Digimon.

During the battle, she infected their partner Digimon and turned against Kabuterimon and attacked him, trying to infect him too, but Izzy manages to Digivolve him to MegaKabuterimon and then Digivolve into his Mega form, HerculesKabuterimon.

He was able to capture Meicoomon and cure the other Digidestined Digimon, stopping her rampage before going back to the Digital World with them so it can reboot.

Loss
Meicoomon was able to redeem herself and be reunited with her human partner, Meiko, but it didn't last long when Gennai attacked her by choking Meiko till she falls unconscious, Meicoomon once again Digivolves to Meicrackmon and goes berserk.

Coexistence
Meicrackmon Dark Digivolved to Raguelmon, and once again fights the Digidestined and their Digimon partners. She easily defeats Seraphimon, Hououmon, Vikemon, Rosemon, and HerculesKabuterimon, reverting to the In-Training forms, and manages to fight Omnimon and Jesmon. Raguelmon later fuses with Ophanimon Falldown Mode to become Ordinemon, and flew off.