>>536844424
Reiko debuted in TABA. Basically a strict teacher who gets overwhelmed by the pleasures of her augmented body. In her ero scene, (evil) Fuuma captures her and through demon science got turned into a futa, possibly by Kiryu Mikoto, older sister of Kiryu Sabato who also turns herself into a futa. Kuroda Tomoe, Reiko's obsessive student attempted to rescue her but was also captured and "trained" with Reiko. Eventually the two were recovered, but Reiko's modifications were not cured and Tomoe became obsessed with futanari.

In an Event Story, Reiko's futa features carried over which suggests that her scene is canon to the main story of TABA, unlike other what if ero-scenes. Fuuma, disguised as Tomoe, infiltrates Gosha to recapture Reiko, who is suffering from her frequent "erections." He was confronted by Asuka, who has a hate-boner for him in this timeline. The real Tomoe revealed herself to Reiko and that she planned this kidnapping and voluntarily turned into a futa for her. Reiko gives in to depravity and together with Tomoe joins Fuuma to fight Asuka. In the end, the two joins the terrorist organization. TANA's duo became the resident "futa couple" in the Taimanin franchise.

I don't know how Reiko's condition carries over to RPGX's main story but her ero scenes still portrays her and Tomoe as futas. Since AT is a PG-13 brand, I doubt her endowments will get a mention. The closest Gremory can get will probably beTomoe having a yuri crush on her teacher.