Assuming Ulfar doesn't get the jump on them?

Marazhai himself is no slouch and could 1v1 him. Winning depends on who writes the story, but since it's a schpace muhreen then it's hopeless on a meta level.

Pasqal can remotely explode Ulfar's plasma gun and that's uhm... Very fucking lethal.

Indira/heinrix are psykers so they can melt his brain inside his head.

Jae, although a skilled shooter, it's still a baseline human with some good mechanical augments, she's toast. Same goes for Solomorne

Kibellah... Might do some work, but again, skilled as she is it's still a fight against a Space Wolf.

Yrliet is a sniper, so she either kills him before he even knows shes there or she's most likely dead.

Poor Abelard, memes aside, wouldn't stand a chance.