Stellar is considered a very odd kitty pet, normally not leaving their home of the library very often. But they are normally very aware of plans being done by the two legs. After a long time with them, it seems that he has learned how to translate a bit of what the two legs can say and knows how to get their attention. Due to the star print on their head they are sometimes thought to have been bestowed great power and knowledge, in reality, he was raised by two legs at a bit too young of an age and has sat in for a lot of lessons from growing two-leg kits. 

He is a neutered male and has a feminine name he is used to because his current owner didn't know what he was for a bit of time. 
He is not super friendly but he is patient. He is not territorial.
The library has an observatory where Stellar normally stays, he turns things on and off during the night. 

My gf makes warrior cats and I was willing to help her with some project, so I make cats that happen to be live around clan life.  Often enough though I stayed out of those group even if i indulged some warrior stuff.