A little late but I say each individual rate Cait Sith exactly as you perceive him. If you think Reeve is a part or if you think Reeve is a separate entity, its your own opinion in the portrayal of the character in the end so rate as such.
Not much to say about this guy for me. He is your abnormal/weird party member with some relevance to the story. Nothing great but I remember nothing bad about him either. Though he never found a spot in my party.
4/10
---
--
---------