When Ink gets too emotional, he vomits ink. He has short term memory and easily forgets things, sometimes stopping mid-sentence to try and remember what he just said a few seconds before. This is why he takes notes on his scarf. By himself, he is a emotionless character devoid of passion. However, the paint he drinks in his vials that are stored in a work belt across his chest makes him feel emotions—each color representing a different feeling. Ink can be cruel and mocking.