Yep, Elios seems like the right one for Sasame. I can definitely see not wanting to do the same for the two characters you play though, haha. The only other one I can see for Sasame would be Peromei but I'm already thinking of that one for another character I think I might app if I end up fitting into the game well.

Ooh, it'd be cool if I could get a plot hook with him right away.

I could also see Thras for Takako, maybe, since fear is mentioned sometimes in her character arc, but I can definitely see an argument for Aiada too.