Haven't really ever thought about it. Hmm ...
Katsu doesn't particularly like being formal, though he knows how to. Doesn't do the whole dog and pony show of false politeness, so he comes off as a bit curt sometimes.
He'd pretty much use Boku consistently. When he's forced to be formal he tends more towards Watakushi than Watashi as a bit of a show of displeasure with the requirements of propriety since old-fashioned is hardly a word that defines him.
He uses Ware when he's serious about something: Ware wa Shinobi.
The highest he'll go with honorifics is sama, the lowest is teme. The only person he's called dono, ever, was the TXY Mizuno Yuki, but she talked him down to san after some time.
He calls his students by first name only, or adding kun sometimes.
Teammates ... somewhat iffy. Whatever's shorter, because it's faster in a tight spot. The fact that he's never thought formality had a place there got him into a bit of trouble - Kaiou Michiru took objection the first time he just called her 'Kaiou' on a mission and kept doing so.
Casually, he'll use family name and -san when he doesn't know the person. Personal name and -san when he does and doesn't care one way or the other. Personal name ... iffy ... either as a brush-off (as in, 'Kiba, shut up') or when he's just casual about something to people he knows he can be casual to (as in, 'Ne, Neshan, 'Nenai? What shall we blow up today?'). Just family name when he's annoyed and brushing someone off ('Yamanaka, I need that arm, damnit') or something to that effect.
-Griever
When tact is required, use brute force. When force is required, use greater force.
When the greatest force is required, use your head. Surprise is everything. - The Book of Cataclysm
Katsu doesn't particularly like being formal, though he knows how to. Doesn't do the whole dog and pony show of false politeness, so he comes off as a bit curt sometimes.
He'd pretty much use Boku consistently. When he's forced to be formal he tends more towards Watakushi than Watashi as a bit of a show of displeasure with the requirements of propriety since old-fashioned is hardly a word that defines him.
He uses Ware when he's serious about something: Ware wa Shinobi.
The highest he'll go with honorifics is sama, the lowest is teme. The only person he's called dono, ever, was the TXY Mizuno Yuki, but she talked him down to san after some time.
He calls his students by first name only, or adding kun sometimes.
Teammates ... somewhat iffy. Whatever's shorter, because it's faster in a tight spot. The fact that he's never thought formality had a place there got him into a bit of trouble - Kaiou Michiru took objection the first time he just called her 'Kaiou' on a mission and kept doing so.
Casually, he'll use family name and -san when he doesn't know the person. Personal name and -san when he does and doesn't care one way or the other. Personal name ... iffy ... either as a brush-off (as in, 'Kiba, shut up') or when he's just casual about something to people he knows he can be casual to (as in, 'Ne, Neshan, 'Nenai? What shall we blow up today?'). Just family name when he's annoyed and brushing someone off ('Yamanaka, I need that arm, damnit') or something to that effect.
-Griever
When tact is required, use brute force. When force is required, use greater force.
When the greatest force is required, use your head. Surprise is everything. - The Book of Cataclysm