Where is the Yuma Kuga cosplay here? Did people mistake Antispiral Nia's costume for Yuma's Black Trigger armor? (I mistook Kaworu's jumpsuit for Chulainn's bodysuit, so I can't judge lol)
Also, this is from before the Houseki no Kuni anime, but I'm fairly certain this is a cosplay of Phosphophyllite.
And the blue sashes in that Luna Nova uniform mean that's a cosplay of Diana.
And the one with the suit near the bottom is the Life Fiber Master from episode 7.