Thinking about how, in The Suffering Game, Taako sacrifices his "beauty" (whatever that means to him personally) and has his appearance permanently changed and how, on top of this being about his vanity, his appearance is unknowingly one of the only remnants/remainders of his sister he has? Like, they're identical twins, and the concept that his appearance is one of the only remnants of Lup left in the world after she was removed from everyone's memory is so interesting and sad to me. The idea that Taako unknowingly gave away one of his last links to Lup that he didn't even know he had, and feeling some sort of deep loss about it that he literally, physically cannot describe or think too hard about...and sure, he can magic his appearance back to an extent, but he has fundamentally lost such a big part of not only himself, but of the most important person in his life, and he doesn't even know.