Fuun
∧_∧ / ̄ ̄ ̄ ̄ ̄( ´_ゝ`)< ふーん
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In Japanese, "ふーん"/"fuun" is onomatopoeia for a sigh. Which is what this guy's deal is. He is a character that goes "fuun".
Fuun is a cool dude who smokes sometimes. He's also a cousin of the Sasuga brothers.