User blog comment:Suni-re/Help find a unit name!/@comment-5812133-20170823151301

Hm, I kinda used google translate for this XD.

Eis Yang; from Eis (which is german for ice) and Yang (Chinese character 陽, which could read as sun)

Eis because of Sumire's surname, and how her first PR is based on Snow White.

Yang becuase of Mahiru's sun motif and the meaning of her name.