I know she's probably too minor a character to get a full character arc, but now that @hiddenfolk has got me thinking about Eiko, I kinda do hope that someday she gets confident enough to confess her feelings to Iruma and to Ameri. Not because she thinks they're likely to feel the same way, especially if she's never really managed to talk to either of them before, but as a benchmark of how admiring them has made her a more confident person. And while my first choice for Mairuma endgame is Love Trio + Ameri + Extended Polycule of Misfits because I am That Multi-Shipper, if we assume that canon endgame is probably going to be Iruma/Ameri, then Eiko's confessions could fit into that relationship progression. Basically, I could see Eiko's confession to Ameri as a catalyst for Ameri to confess to Iruma, even if they aren't the same rank yet. After all, if Eiko, who is probably still not that high-ranked, can have the conviction to tell Ameri how she feels, then maybe Ameri will be inspired not to put off her own declaration of love. And for Iruma, Eiko confessing to him might get him to finally think about his romantic life, since recent manga chapters indicate that he's currently pretty flustered at the whole topic.
