I didnt see any option to use animal form. I played it some time ago.
I remember there being a animal form spell in my latest playthrough but nothing for its use during the test. So there was no choice but to stumble about trying to 'brute force' my way through.
Of course I used the option I thought most likely to use Knowledge or Spellpower. I still failed 2 or 3 times before id be allowed to pass, even with 50 knowledge.
Like I said, Im a nerdy guy, I dont socialize in the common room or anything like that. So I met Violet and I liked her. Met the class president girl, because its part of the story, and thats it.
During my latest playthrough I started working on my Prowess after the test of knowledge but I didnt seem to meet any other girls, not that I wouldve paid much interest if I did. I was pretty invested in Violet by then.