ooh. well Bri is certainly more than happy to pull someone else's. she can be gentle about it and do it in more of a guiding way or just a little tug so she can get at someone's neck, etc. but she's also not afraid to be rough about it if necessary or asked for (perhaps unsurprisingly)
as far as her own, if someone surprised her with it she would react poorly, increasingly so the less history/relationship she has with said person. overall she's not opposed - to a point. though I'd say it's one of those things where she would be less inclined if it happens right away, versus if she's... gotten warmed up a bit
and also if she knows/trusts that whoever she's with would only do certain things in a certain way/context - if that makes sense. like if it's more just, they're having rough sex so there's some hair pulling involved. not anything that might veer too much into the degrading category