He's an idiotic shit and dumb ass when pen is involved. But when his real younger sister is involved, he would be the best older brother. At the very least, a doting older brother.
Thats why when the flashbacks came in and this makes me feel like what if the younger sister is real and she really came back. It wouldn't be wrong for him to love the real younger sister more than pen.
The truth is, it will never be and this guilt of him makes him more easier to be brainwashed.
Ah... I really am confused on how should I feel about him anymore.

Now I dont know how to feel about derrick.