it's a dog/fox/cat thing
how can it be dragon type

coughGhostTypecough

Ghost type is physical.

That eeveelution is cute as a button.

This expression bothers me. Buttons aren't really cute...

Can anyone translate the Japanese that's all over the place in that picture?

I doubt it's Normal-Type. If someone wanted their Eevee to be normal-type, they'd just not evolve it, but there is the possibility of it learning totally different moves.
I'd say it's pretty hard to guess. I mean, hell, Flareon is just a slightly resized Eevee with a different palette. It's not hard to guess but just slightly changing the colors can totally change someone's guess as to what type it is.

i actually think it's flying type after looking at its design once more
i think it looks like a certain gym leader

Lrn2Idioms

Ooh now that you mention it, flying type seems to match up pretty well with the design.

i mean, those ribbons could be wings or they could be butteflies (bug type)

kudos

Yeah definitely flying type. The coloring looks a lot like Skyla.

It looks a lot like Milotic too.

Perhaps it evolves through max beauty?

we can probably rule these out

theory 1: when an eevee breeds, (Lays an egg at daycare) if it was female it turns to Ninfia if it was male it turns into another thing.

theory 2 : trading either holding prism scale or holding something else, or trading for a male eevee, when this happens the person who sent male gets ninfia, and the person who sends male gets something else.

here is why i do not think it is friendship: Eevee evolves through happiness by day or Night, if another evolution comes it would be a roulette too many things to consider.

i totally didnt google search this btw