Most of the time I'm pacifistic, friendly and do everything right as possible. I had a difficult past in which I suffered a lot. X!Gaster overwritten my world a huge number of times, he wanted to create a perfect world and never cared about my feelings. As a result my brother X!Chara gave his soul to me when I died, and now we share this body. Rarely when I start behaving aggressively, violently, or just looking like a psycho, It's just cus he invisible for others taken control of my body.