Board Thread:Wikia Discussion/@comment-25351051-20150420104608/@comment-24980562-20150503023520

Simple. 中間 can be translated as "midway", and since she's supposed to represent the Midway Atoll, it's only logical to translate it as such. I'm pretty sure the devs had this in mind when they named her. Besides, "Middle Princess" would sound just lame.

Dunno about 離島棲鬼. I suppose you can translate 離島 as either "remote island" or "isolated island" depending on the context.