Friendship Necklace is a trinket added in The Binding of Isaac: Repentance.
- Familiars that normally follow Isaac orbit around him instead.
- Does not affect familiars' ability to block shots: if they don't already, they still won't.
- Child Leash: Familiars will orbit much closer to Isaac.
- King Baby: Familiars will orbit King Baby at all times instead of Isaac, even while not firing. King Baby itself is unaffected.
- Smart Fly: Will still leave Isaac when he is damaged.
- Spin to Win: Familiars made into orbitals by Friendship Necklace can deal contact damage while Spin to Win is active.