- Cardiovascular Brotherhood/Sisterhood
- Cardovascular/Heart Connection
- Heart Brotherhood/Sisterhood
- The Cardiovascular Brother/Sister
- The Heart Brother/Sister
User possesses a link to somebody/something through their heart, which allows them to know each other's locations, share in other power(s) or other capabilities.
- May be irreversible.
- Corruptions or imperfections of their souls may carry onto the other.
- Death of one or more of the users may sever the link.
- Death of one or more of the users may result in the death of all of the users.
- Reoko Banryu (Bubuki/Buranki); via Entei
- Sora (Kingdom Hearts)
- Ventus (Kingdom Hearts)
- Corakinus (Class)
- April (Class)