Heaven’s gate guardian

As Cerberus guards the gates to hell, so too does this holy being defend the entrance to heaven
from any that would force their way into paradise.

The guardian is a truly fearsome and intimidating warrior who carries a massive key that unlocks the gate he protects. It is said that one of a pure will and untainted soul could take the key from him and enter heaven.
Many have tried since the dawn of time, but so far none have succeeded.