Is that Fate or Vivio?

it should be Vivio since she has two different eye colors, right? Though, the hair does look like Fate's

So, which is it? Vivio or Fate.

Pixiv tag says Fate

its fate. look at the costume

Everything looks like Fate with Vivo's eyes and Hanyuukari says artist say Fate so I gonna go with Fate

This wish there was a story to this pic