Ivan

"“Hey now, Paris... are you worried about me?”""- Ivan, to Paris"

Personality
Ivan appears to be a hard worker, considering he hardly gets rest and was awoken by Paris at his work desk. He also seems careless and untidy by the looks of the room he was in, which contained broken furniture, spilled paste, parts of toys, and crumbled up pieces of paper lying across the floor. His arm has ink and his fingertips have bandages on them, which shows he probably makes new creations often.

Paris
Paris is Ivan's creation. Ivan created Paris to be a monster; made for destruction, and made to rebel. Obviously, he did this so Paris can do the opposite. So Paris's true nature is to be obedient. To obey every order Ivan gave to him. Which was to 'stop everything he had created'. But 'stop' meant 'capture' to Ivan, but Paris disagrees with this idea and called it "ridiculous". This is also why Paris often calls Ivan, 'idiot' and 'fool'.

The first interaction between the two seemed more on the bitter side than friendly. It seems they have 'joked' about Ivan dying one day. At the beginning of chapter 7, Paris said, "It'd be terribly inconvenient if you dropped dead... Ivan." After waking Ivan up to which Ivan replies, "Yeah, inconvenient." With a small smile appearing on his face. It appears these types of conversations happen often.

Yuzo
Their relationship is unknown at this time, but both know that Paris and the other creations exist.

Ability
Ivan can build whatever his heart desired. There was nothing he could not build, but everything he built was flawed. His creations would do the opposite of its true purpose, in terrible ways. He didn't know until it was too late.