Crux

Crux, "The Southern Cross", is one of the Silver Key Celestial Spirits that is owned by Lucy Heartfilia. It is unknown if Crux can be used for combat purposes. However, it is known that Crux has the ability to search for information about Celestial Spirits and their owners by sleeping, though he's forbidden to reveal too much, as one's activities are still a private matter in the Spirit World. His full name is Crumudgeon.

Physical Appearance
Crux appears to be an aged celestial spirit. His head beholds a giant, metal cross with floral-like golden patterns. He also has a white-haired mustache sprouting from his nostrils that also appears like tiny crosses. Oftentimes, he closes his eyes however, he will eventually open these if he found his objective. He seems to be wearing a medieval-like outfit, complete with green pants and wooden pointed shoes. His arms and legs are skinny, and appears to be tanned orange. On his arms are blue-colored knots attached to his wrists and elbows.

Crux is currently missing a tooth and he favors to levitate than to stand.

Personality
Crux doesn't talk very much. This can result from his restraint. He also often falls asleep.

Powers and Abilities
Scanning: Crux is an expert on Celestial Spirit Magic. He knows all that's going on between humans and the spirit world, and can thus scan past people who have been in contact with Celestial Spirits and Celestial Mages. While he's doing that though, he falls asleep.

Levitation: Crux, after being summoned, indefinitely hovers in the air.

Immortality: As a Celestial Spirit, Crux cannot die, unless he is somehow forced to stay in the Human World.

Telepathy: Crux is able to mentally communicate with his owner without being summoned.