One of the 72 Great Demons. Also Beatrice's friend. When a magician demands it, she grants the ability of instantaneous movement.
She uses this extraordinary power for playing pranks, mostly. Her specialty is hiding keys and bags during busy mornings.
However, in the context of closed room mysteries, this power becomes an ultimate weapon that can easily strike a finishing blow. Her queen bee strikes are likely to pierce any and all detectives, forcing them to surrender.
Theories
Gaap is the meta counterpart of Nanjo
Yes, we're serious.
Look there aren't many options left. It has to be someone involved with Sayo. If it's not Nanjo we're left with just about Kawabata.
She is really good at creating closed rooms just like Nanjo when he lies about someone being dead.
We believe in Gaanjo.
Knowledge of the loops
Every meta character who sees and references events from multiple episodes is somebody who is aware of the Bottled letters that have been found in the future.
This would include:
Sayo as Beatrice, Kanon and Shannon
[REDACTED] as herself
Genji as himself and as Ronove
Kumasawa as Virgilia
Ange (retroactively from the future)
EVA Beatrice (either retroactively or because she was actually present there)
Possibly Nanjo as Gaap (Gaanjo)
We notably can't make this claim about Kinzo and Maria.
