GeminiTay's officially unnamed costume from season 10 of Hermitcraft. Sometimes referred to as "Dredge Gem", as it was inspired by the game Dredge.
This costume has her hair down instead of in her typical double buns/braid, and tied up with a blue headband. She also wears a dark blue cape over an all-blue outfit, and brown boots, and gold jewelry.
This tag implicates geminitay (learn more).