Seika

The maid of the mansion.
Possessing skin so clear and translucent plus beauty so overwhelming, her appearance almost resembles that of an actual doll.
As she's both quiet and expressionless, one too, similar to Maika, cannot read at all what it is that is on her mind.
Since she only serves Maika, she doesn't listen to any other instructions except hers.
On the contrary, if Maika is the one giving the orders, she will execute them without ever changing her complexion, making one feel as if she's some kind of artificial doll somehow.