[quote=@Hantu Kongkek]
<Snipped quote by Unoedipal>

Would've been that or a Saber. After all, he is a big knight guy.
[/quote]

A big knight guy could also use a spear. Or a craziness that's deactivated. Or magecraft. Or a sword. Basically he could theoretically be anyone besides Assassin. A sword actually makes a lot of sense, since he has a sword. 

I also don't get why "big knight guy" makes you think "one of those classes that's not called a Knight Class".

Basically there's zero reason to assume he's Rider and you're only doing that because you know he's Rider OOC. 

Don't metagame. It's bad.