Rei (disambiguation)

Rei may refer to:
 * Strike Unit R.E.I., an Uber Rare Cat from the Air Busters event.
 * Rei, a Super Rare Cat from the Merc Storia Collaboration Event.
 * Rei, an enemy appearing in Merc Storia stages.
 * Rei Cat, a Rare Cat from the Neon Genesis Evangelion Collaboration Event.
 * Rei Ayanami, a Super Rare Cat from the Neon Genesis Evangelion Collaboration Event.
 * Rei Ayanami (???), a Super Rare Cat from the Neon Genesis Evangelion Collaboration Event.
 * Rei Uzumasa & Cat, a Special Cat from the Get On! Kyoto City Subway Collaboration Event.