For the record, the reindeer isn't helping Jared. In the post itself, the driver (who we know as Kristoff) helped kill one of the wolves, and then Jared killed the other two himself with Sonic Blade. That means the Reindeer should logically be going for a different wolf, either one of the two fighting Elim or one of the ones on Kasus. The Snowman (Olaf) isn't actually fighting any of them, instead hiding behind the sled and lobbing snowballs from behind it.