Arne

Arne (アーン, Arune ), is the one apprentices that are in Palestra. Arne can use the element of Water.

Training At Palaestra
Arne and Komachi, students at the Palestra , are friends of Yuna. They follow the short workouts together. During the basic training which Kōga participates Komachi is slightly affected by the attack Ryuho, who had put too much force.Neither one nor the other fails to qualify for the Saint Fight,although they participate in the selection test on Cosmo Delta.

Martians Invasion
Later, the Martian troops attacked the school and they end up trapped in the Babel Tower as most people in the Palestra.

Cancer House
Arne and Komachi reappear as zombies invoked by Cancer Schiller, who manipulates them against Aquila Yuna. Yuna learns that Schiller uses the minds of the Saints locked in columns that feed the Babel Tower, and that they are still alive. Aquila Yuna defeated Cancer Schiller and saved her friends.

Chronology (Pallas-Hen)
Arne survived the Tomb Sqeeze of Cancer Schiller. She's seen alongside Crane Komachi and Camelopardalis Bartsch taking care of refugees from villages attacked by the Pallasite and preparing the defense of Palestra alongside other Saints.

Constellation
Lepus (ˈliːpəs/, colloquially /ˈlɛpəs/) is a constellation lying just south of the celestial equator, immediately south of Orion. Its name is Latin for hare. Although the hare does not represent any particular figure in Greek mythology, Lepus was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations. It is located below the constellation Orion (the hunter), and is sometimes represented as a hare being chased by Orion or, alternatively, by Orion's hunting dogs.