The way cam speaks and holds himself is quite older than what he looks like
Hazel found him confused and lost in the middle of no-where with the only thing on him being a bag that clearly wasn't his. She decided to stick by his side after talking to him and finding that there was more to his story than what could be seen, and she wanted to uncover it!

Cam is a Ketucari who hides himself behind the persona given to him by his (very late) master which is what many see and know him as here!
You can find his real apperance and more story Here!
He also doesn't have a real name, Camellia Is the name his beloved master gave him and as such he goes by it.