No, dammitall, we never get to see anything canon beyond Yuki's flirting - which does indeed make me think, sometimes, of Gojyo with a college education and more confidence. (So I guess he's closer to Kenren, but most of the time his diction is so wittily refined that when he does come out with something vulgar - which he did in vol. 27 - everyone is totally appalled ... .)