Why did Dirk act super stoic and unlike the other kids while in trickster mode?? Was he aware of what was going on or what was happening? Also similarly, in the clip Game Over, why did Gamzee kill Karkat? Did he forget that they were moirails??

Dirk is a Hero of Heart with pretty strong internal turmoil and quite a bit of self-deprecation, so. Strong self identity and perhaps lack of any will to act upon his more selfish desires.

Also Gamzee broke his Moirailship with Karkat because he’s a piece of shit murderclown- Actual phrasing actually, no offence, he says something like that in the Meteor. He’s also in a murderous frenzy there? Gamzee’s pretty god damn fucked up.