Fusion With Rei: https://www.deviantart.com/aniahmator/art/Rei-And-Aquarius-Fusion-741954269

Aquarius is one of the spirits that help out Rei as the Zodiac Wielder. He is a rather calm yet lively spirit that is mostly seen around Pisces. He is Pisces's boyfriend. Along with the 12 other zodiacs, he aids Rei in fighting the Reverse Zodiac Wielder and the 13 Reverse Zodiacs.