Gordon: "Hmm, difficult. Very difficult. Plenty of courage, I see. Not a bad mind, either. There's talent, oh yes. And a thirst to prove yourself. But where to put you?"
Marten: "Not Slytherin. Not Slytherin."

Nice! And you saved (at least some of) us the trouble of searching a suitable Sorting Hat line. But I'm still tempted to continue that dialogue...
Gordon: "Wrong answer!.... Wrong answer? OMG...." (pair of tentacles swells, turns purple, and falls off)
or alternatively just go with something different such as
Gordon: "Dandruff and sweat into my silk gland again. Hello, yeast infection. Thank you very much. For your sake I hope the biometrics won't be thrown off."
Marten: "?"
LadyBot (off-screen): "Gordon, this job is your CALLING."