This episode (Family Therapy in VRCHAT) feels like a prime example of why I think Sun has C-PTSD. He's having so much trouble mentally removing himself from the past, and (like Earth points out) he gets visibly uncomfortable and crouches in on himself during emotional moments, probably because of how OldMoon used to handle this sort of stuff.

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I really find it interesting how we saw sm of theresias backstory and how the title of sword saint while many would see as a blessing was a curse towards her until eventually she had been “saved” by wilhelm who had worked so hard to get stronger just so he could let her retire that curse regardless of what everyone thought as she was his reason to fight I like DIE over love stories like that and in the end wilhelm really did finally get to say he loved her even though all along she had known simply by his gestures (I also find reinhard and his families relationship developments interesting as he really didn’t feel guilt OUTWARDLY over killing her as he believed she was an reanimated corpse while Henkel and wilhelm had rather seen or known that she was still in there somewhere as well as like we see how wilhelm was upset yet he didn’t take it out on his grandson and rather said he understood it was the right thing yet it was something that deeply hurt him) also pandora is a b*tch (expect more yaps ig im reading the ln however only at arc 1 and have caught up on the anime)