"You can't tell between front and back doors? Who can be so sure? It depends on whether you're entering or exiting...just like humans."
How to obtain:
Premium Summon or Evolve Rank 3 Rare Celestial devil
Originated from the god of doorways. She has two faces like the front and back of a door. For this reason, a person whose inside and outside are very different is sometimes called Janus. Her abilities as a devil are pretty reliable.