|Appearances||Forbidden Siren 2|
|Voice Actor||Nana Yanagisawa|
Ikuko Kifune (木船 郁子 Kifune Ikuko?) is a character in Forbidden Siren 2. A marine biologist with strange psychic powers, Ikuko can control the people she sightjacks through some kind of possession, and is the twin sister of Ryuko Tagawa. She comes to Yamijima Island unwillingly, drawn by instinct.
Ikuko boarded a boat called the Shoseimaru to work her part-time job is a young radio operator. After being swept away into the eerie red sea along with the other passengers, she washed up on Yamijima as though led by something. Acting along with Mamoru ItsukiItsuki from the middle of the story onwards, she closed in on the core of the strange occurrences plaguing Yamijima.