Cyto is Hermione's starter pokemon, so naturally he's very protective of her. While he is usually serious, he also has a playful side, and likes to tussle with other pokemon for fun, often trapping their limbs inside his goo-like body. He's also naturally very curious, and likes to learn new things

Hermione met Cyto as a Solosis when she arrived in December 2017. He evolved at Ruins of Alph during a trip with Hermione, Credence and Newt Scamander in order to protect Hermione, but also to intimidate Jez - Credence's pokemon at the time who was playing tricks on the pair. He evolved into his final form during another confrontation with Credence's pokemon at Hermione's house when she was threatened by his Alakazam.

Psywave, Reflect, Rollout, Snatch, Hidden Power, Light Screen, Charm, Recover, Psyshock, Endeavor, Future Sight, Pain Split, Psychic, Skill Swap, Protect, Heal Block, Wonder Room, Gyro Ball, Hammer Arm, Confusion, Psybeam, Ally Switch