I love Susie so much, and hugely relate to her in the way she puts up kind of a tough girl face and immediately turns into an energetic goober the second she falls into the moment instead of getting in her own way.
I feel like she'd be insistent that she's not feeling little—or even personally unsure if she belongs, even when her friends know and are accepting—right up until she's offered something she wants or is invited to play in a way she's interested in, and suddenly she's the most wound-up kid in the room with a huge smile and fruit gummy fragments stuck to her snout.
Susie is a very tough, very big girl until shes not and while Ralsei is very overt in his babying, Kris is very subtle and not too outwardly affectionate in a way that drops that girl like a STONE. Ralsei is trying to learn Kris's ways. Im with you that Susie is a very toothy smiley kiddo when she gets rid of her hesitations!