Otoha Kisaragi

如月 乙羽

Chikane's personal maid, Otoha is loyal and devoted to Chikane to the point where it is heavily implied that the former may be in love with the latter.

When Himeko comes to live with Chikane, Otoha immediately notices the bond between the pair and grows intensely jealous, angered at Himeko for taking Chikane away from her and hurting her mistress. Aside from playing a humorous role and some very weighty scenes of her own in the series, she is a support character who clarifies how Chikane reserved her feelings for Himeko alone.

(Source: Wikipedia)