Just think about Chara's life for a moment.

Adopted into influential family after being separated from their own parents, hated their adoptive brother who in turn did their best to love them back, hatched a plot to gain power that involved poisoning their adoptive father, killed self to return stronger after death, posthumously killed their adoptive brother, combined with said brother after said death, returned years later as a new being with powers of time manipulation…

AND he knows if you're watching him.

Am I missing anything?