Gemini

Effect

Spawns a conjoined familiar, much like Gemini's small twin, Suture. It chases enemies close to Isaac, dealing 3 damage per tick (~8 damage per second).

Despite its appearance and description, Gemini does not count towards the conjoined transformation.

(Added in Afterbirth †)(Duct Tape) Duct Tape: The familiar will stay in place relative to Isaac, but the effect of chasing enemies persists.
(Added in Afterbirth †) King Baby: Suture will rest near King Baby if there are no enemies near Isaac, but will snap towards the enemy once one gets close enough to Isaac. Otherwise, no functional difference.
(Added in Repentance)(RC Remote) RC Remote: The familiar can be extended way past its attack range, and will still do contact damage, but will only chase when an enemy enters the usual aggro distance.