Free Download Mikasa Ackerman HD 640x1136 resolution Wallpapers for your iPhone 5, iPhone 5S and iPhone 5C. Downloaded 228 time(s). File format: jpg . File size: 125.41 kB. Mikasa Ackerman is the female protagonist of the series and the adopted sister of Eren. After graduating as the top of her batch, she later joins Scouting Legion with Eren and Armin.