There is a few problems with your bio but overall it looks good.
1.) Origin must be feral or escapee. Feral means any cat or dog who never had an owner and had to hunt and/or fight to survive, escapee's are run aways who chose to leave their owners
2.) the personality look ok but I don't really see any good traits, timid, often offended, low-self esteem, and being very sensitive can all be considered 'bad' traits. Quiet can be considered a good trait if she was like quiet and thoughtful, but since shes quiet and timid its more of a negative trait. Things like, friendly, calm, helpful, good with kids, enjoys hunting, adventurous, brave(but not stupidly brave), smart, wise, and much more are good traits.
3.) Your physical description is good and I can easily picture your cat, but we have a minimum of 3 sentences on it and you only have 2.
4.) And then this isn't really a rule, but I'd like to suggest you change your cats name. The name you have is very easily noted as a name used in the way of the warrior cats books. If you really, REALLY want to keep this name I'll let you just this once. But in the future please try not to. I to like warriors but I'm trying to get away from them with this site. It's not meant to be similar to them but my own thing. You could maybe translate the words pebble and stream into a different language and make it your cats first and last name.