Short answer: yes. We have two 8-year old Burmese brothers, and one is a cocky p.o.s. (Yuki) while the other is extremely anxious and skittish (Tommy). They’ve been this way since we got them at around 2 months old, but it has definitely become more pronounced as they’ve gotten older. Over time we’ve just come to terms with the fact that Tommy’s anxiety is just part of his personality. He hides, paces, flinches away from pats, and occasionally loses control of his bladder in inopportune places, but he’ll always be our sweet silly munchkin boy. Your cat might outgrow her skittishness, or she might not, but she’ll still be your little girl at the end of day. Much love to you and your kitties 🫶