This art of an unnamed female character (with Squirtle) was featured on the cover artwork for the official strategy guide for Red and Green, as published by Shogakukan. Sugimori had stated that he wanted to portray a trio of Trainers facing against each other, hence created the female character for the cover.[12] When Red and Green were being developed for a remake, Sugimori took the unnamed female character into consideration as he was designing the female player character, who later became known as Leaf.[13]

A character named Green later appeared in Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!, whose design appears to have taken inspiration from both the unnamed female character and the female player character of FireRed and LeafGreen.

The unnamed female character also appeared several times in manga-styled instructions illustrated by Emiko Yoshino included in Pokémon papercraft sets (bottom).

In the Pokémon Adventures manga, a similar artwork appeared at the end of Volume 3 (right). The design of the character Green seems to have drawn inspiration from this unknown female character. After the release of FireRed and LeafGreen, Green donned the same outfit as the female player character in the fifth chapter of the manga.