Lol, Seth, the kind of guy to get absolutely no votes, know he won't and still vote for himself.
Speeches, just stands up. "If you don't vote for me. I will find you. I will eavesdrop, I will do the math. And every person who doesn't vote for me. I'll kick all of your asses."
Eh, I guess Slayspike could return. What's funny is even though it's a combination quirk, Seth's father's quirk was much more stronger than his. He could make spikes from any surface, and they could get really big.
Also, I think Seth would beat Yukino one-on-one, because his quirk isn't actually very powerful, it's just that he's very good with it. It's only a weapon at this point. That's his main insecurity, he knows everyone else will eventually surpass him. However, Seth actually getting to fight Yukino in a 1v1 most likely isn't going to happen during the combat training, as he physically can't touch Ken.