"Morty Prime has the same eyes as Rick C-137" Okay I'll do you one better: Morty Prime has the same eyes as Rick Prime, so whenever C-137 looks into Morty's eyes, all he sees is the twist maniac of a man he's been trying to kill for decades
// chapter 5 spoilers
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Some people were mad about Clover killing themself as a resolution to Undertale yellow but I guess that's the one thing the fangame got right about the yellow soul's characterisation