[Siffrin tries to assure him that they aren't expecting a full hair care routine, but the idea is frankly appalling to Isabeau.  No, no, he won't be giving him anything less than his absolute best.  This is about his pride in his work just as much as it is his love for them.]

What?  Of course I have to go crazy.  I've been wanting to go crazy on your hair for months.  But saying so would have been really crabbing rude of me, so I've been waiting.  For either an opportunity, or an invitation.

[It has all the right characteristics to be sooooo fluffy and soooooooooooooo luxurious.  Like there aren't enough vowels in the alphabet to properly convey just how so those things it could be.  But Sif is the roll out of bed type!  Give it a quick few swipes of a brush and they're good to go!  It has been equal parts adorable and infuriating to watch during their journey.  He and Mira might have privately commiserated over it once.  Which... makes Siffrin's followup both perfectly understandable, and also incredibly embarrassing.]

I... I did?

[He seemed jealous?  That's so pathetic yet so instantly believable, that he can't do much more other than flush bright and curl in on himself, burying fresh embarrassment into the darkless hair his hands just abandoned.  Mira beat him to the punch of asking Sif about combing their hair?  Got to straighten out all those knots and errant flyaways, in a way that was probably very relaxing and comforting and pleasant?  Change.  Of course he got jealous.  Of course it was so obvious that even Siffrin noticed.  He's not exactly a subtle guy!  Never has been!  He muffles a quiet groan into his hair and braces himself.]

Give it to me straight, Sif.  How bad was it?

[The jealousy, not the hair combing.  That was probably super nice and he almost doesn't want to know, because he.  He... is just maybe a little bit of the jealous type.  Even though he really tries his best not to be.]