So, akorin is a staff member of IOSYS and also goes under the aliases オヌマ愛子 (Aiko Onuma) and オミ織葉 (
maruamyu gives Oriha Omi as romanization)
Till now she did lyrics for one iDOLMASTER song "Day of the future" and a character song "Tsunagaru Wa" from the anime "Yumekui Merry". (both credited under the last named alias)
This entry from IOSYS' official site gives some explanation regarding aikorin's names.