["Probably" makes Sen chuckle a little, but she has good enough manners not to crack up into uncontrollable laughter, at least...] I'm sure that he is. [Even if she doubts the Shinsengumi a little, she doesn't really doubt their intentions. Just their ability.
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...and then she blinks, because, uh, what.]
"TV"? I've never heard of such a thing before.