mm in general? i think she’s a little menace/pos, and kaeya voice over about her proofs that to me >:) i like to think that when she’s more comfortable with people she’s a little sassy (i mean my girl lowkey bullies Timaeus 😭 but that’s okay they’re besties in my head) also she gets more talkative! This actually something we see in game her being worried that she talked too much but i think it’s cute like yes Sucrose don’t worry talk about your bones collection or the fantastic fantasy world you want to build, or about your experiments! i want to hear!
i also like to hc her as autistic + social anxiety (and tbh i feel like is both are pretty much hinted in canon)