He has indigo skin, cool grey hair and eyebrows. He wears a light Robin's-egg blue long sleeved shirt with teal pants.
He hates gruel, and has been shown to be willing to commit suicide in order to destroy Thembria's gruel reserves with no regard for the resultant collateral damage.
He's also shown to be quite clever.
- His name is a reference to Peter Kropotkin, a famous communist leader.