Reia lives as if he doesn't have a past or a future. All that matters is the present moment, because he doesn't even now if he'll make it to the next day to be able to plan ahead. His routine consists on scavenging trash and stealing food since his earlier memories. There's no rest in survival battle, because even when he's fed he has to run from the police and hide as well as possible.

He isn't the most friendly cat. He's ok dealing with fellow stray cats, but is very wary about people, as most of the time they are just chasing him away for being a filthy robber.

He relies on his cat instincts more than on his human part, what means his vocabulary is extremely poor and he has no manners. He isn't impossible to approach though, Reia can become a lovely cat after some time - it'll just take more work than usual.