delta (honkai impact)
睡美人之梦 狂热蓝调 狂热蓝调Δ 德尔塔 フィーバーブルースΔ
A bubble world version of Rozaliya Olenyeva that merged with her twin.
All posts involving Delta should also be tagged as Delta except when in a different outfit, which then a costume tag from the list below should be used instead.