Yea it is Mitsuchi Keiko ^^
but I still have difficulty on writing the name in japanese (hiragana / katakana / kanji?)
ケイコ ミーツチ
EDIT:
Guys I am now thinking about the function of yellow things in Keiko's head.
Yes it s a thing planted on her head, not an accessories.
Option 1: solar power / nuclear pressure valves, operates like normal battery, charged with sun light. This makes her robotic (just like in chobits)
(not my drawing, it s done by my awesome friend in dA)
Option 2: mental capacity boost device (mcbd). A device that unlimitedly stores information.
Option 3: unique power source just like IronMan's. somewhat it s the thing that keeps her alive.
Option 4: your opinion ?