Binding of Isaac: Rebirth Wiki
Binding of Isaac: Rebirth Wiki

Added in Repentance

Gello is an activated item added in The Binding of Isaac: Repentance.



  • Tainted Lilith Tainted Lilith attacks in the way identical to this item.
  • The familiar persists when Tainted Lazarus Tainted Lazarus switches states.
  • If used multiple times in the same room, the Gellos will eventually overlap perfectly and appear as one after some movement, but all remain functional. This makes Gello exceptionally powerful in Greed Mode, Boss Rush, and against The Beast.


  • Book of Virtues Book of Virtues: Spawns a red wisp on the middle ring. The wisps will orbit Gello instead of Isaac while it's active.

In-game footage[]


  • Gello is a revenant in Greek mythology who causes infertility, miscarriages, and infant mortality.
  • It is implied to be a fetal Incubus Incubus.