Trying to figure out a clan crest for my Vaporeon is hard! But it doesn't help that I can't spend a lot of time thinking of it either, thanks to life. I did come up with this though, which is just literally a photoshopped together lightning/fire/water gym badge from the Kanto region (given the clan dates back to the Kanto game days I wanted to have some kind of nod to the original 3 Eevee evolution types in the crest.) I kind of like how it looks, but at the same time... not really?
...okay the "water" badge is actually just a recolored center of the fire badge since it did have that droplet shape to it already, but you get the idea.