This mischievous specter loves to hide in treasure chests to surprise unsuspecting heroes.
- This enemy was designed by a fan backer via Kickstarter.
- Ikki is a direct reference to Nintendo's Nikki. Her design is based on Nikki's Mii as she appeared in Swapnote. This enemy design was a homage to her "death" when the 3DS message service, Swapnote, was shut down in November 2013 due to abuse of the system at the time.
- Ikki was designed by Temmie Chang, one of the lead artists for Undertale