I always get antsy whenever Tooru’s hanging with Yuki in his garden, wondering what new devilry will come afoul of them. In this case, it’s a snake, but it’s okay, that snake is Souma Ayame, The Snake of the Zodiac. Being cold-blooded, he doesn’t do well when it’s cold, but you still have to wonder if he just used that as an excuse to hide inside Tooru’s shirt dress.
Ayame, who is actually Yuki’s ten-years-older brother he never once mentioned, is quite forward and ebullient, ordering Tooru to serve him lunch, then taking her out for gyoza when she doesn’t respond (due to Yuki telling him to check his rudeness). Turns out Ayame didn’t come to meet Tooru. He heard that Yuki interacted with Akito at school, and was checking in on him, knowing the terror he feels around Akito is on a whole other level as the other Soumas.
When he talks about how hard it’s been to reconcile his younger self (who was less interested in connecting with his baby bro) with his older self (who wants to repent for that younger Ayame) Tooru naturally parrots her mother’s advice about parents not knowing how to be parents…until they’re parents. But also the importants of remembering what it was like to be a child, such that as an adult one can empathize with the next generation.
Ayame is impressed with Tooru’s wisdom, and while Tooru doesn’t take credit, she definitely deserves it simply for absorbing every last iota of her mother’s wisdom (not something most kids do) and being able to so effortlessly apply it to others in order to sooth their troubles.
But as much as she might want Yuki and Ayame to close the yawning rift between them, it just doesn’t happen this time around. Part of that is Ayame is usually an unapologetic cad, and has been one since school when he was classmates with Shigure and Hatori.
He’s also possessed of a particularly silver tongue; whenever he broke the rules, either by growing his hair out or getting caught in a pleasure district, he could talk his way out of it with colorful oratory that would either inspire or annoy his foes into submission.
As Ayame and Shigure reminisce—and Yuki and Kyou sit there and stew—once gets the sense that all his bravado and good cheer on the surface is hiding that deep-seated regret for not being there when his little bro needed him most. Even if he was beholden to Akito like everyone else in the clan, shouldn’t he have put everything on the line to save Yuki…even exile or worse?
He didn’t, and that, much more than his salacious past and forwardness with Tooru, probably keeps that rift between the brothers as wide as it is. In the end, Shigure was more of a big brother to him than Ayame, since he at least got Yuki out of that hell.
Luckily for Yuki, Haruhatsu learns that Ayame is hanging around Yuki, and he informs the only one who Ayame listens to (since he’s always loved and admired the guy): Hatori, who shows up to collect Ayame, ending his reign of terror at Casa Shigure. Later at school Yuki makes sure to thank Hatsu.
And yet, just because a rift will never close doesn’t mean it can’t narrow a little. Yuki learning about Ayame’s devotion to Hatori does that somewhat, which Tooru takes as a sign they’re not an entirely hopeless cause.