Talk:Rider/@comment-43512479-20190825162327/@comment-37376881-20190826154151

Ozzy has a second noble phantasm not shown in FGO called Mesektet. Because Ozzy considered himself to be the enbodiment Ra, he can use the boat Ra uses to carry the sun across the sky, or something to that extent, which counts as a mount. Its shown in Fate/Prototype: Fragments of Sky Silver.

Quetz is like Red Hare. She doesn't have a mount, unless you count the pterodactyl in her extra attacks, but instead IS the mount with her technically being a "feathered Serpent" in her true form.

As for Sami Yi, I couldnt tell you. Its probably a weird reason that doesn't make much sense, like how Beowulf is only a berserker because his name could very roughly translate to "berserk", even though he never went mad in any of his legends.

Most of the time there is a lore reason servants get summoned in specific classes although it's not always shown in FGO itself.