How old is Malingo?

I’m curious, Abarat fans - how old is Malingo in your head?

I realized today that I’ve always imagined him as very young (maybe because of his meek demeanor when we first meet him) - like maybe in his late teens. And I don’t know WHY I imagine him that way, because we have literally no evidence to support that. I’m curious about other people’s opinions. I’d love to ask Clive Barker *dreams*