Freya

Freya (フレイヤ (Fureiya)), also known as Sage (仙人 (Sennin) is the mentor of Reika Tomoe, offering her advice in her Eyecon hunt and occasionally speeding up the process by creating Eyecons herself.

In Ghost
Freya is a net movie-exclusive character who first appears in the Drive Chapter. She appears out of nowhere when Ghost vows to never give up fighting, even when losing horribly to Heart, and summons an apparition of Shift Speed so Ghost can unlock his Drive Damashii. After Ghost and Specter destroy Heart, she takes her leave, but not before asking the two Riders to collect the Legend Rider Eyecons.

In Heisei
Freya takes a much more prominent role in Kamen Rider Heisei, serving as Reika's spiritual compass and as the protector of her Monolith. When Reika's brother, Mitsuru, is killed, Freya makes her presence known to the mourning girl. She tasks her with gathering the 16 Legend Rider Eyecons, explaining that they are able to bring people back to life. After Reika accepts her offer, she takes refuge in the restaurant where the Rider works (and where her Monolith is located), using her powers as a Ghost to keep herself hidden from the public eye.