The Jedi known as the "Wanderer" was a male human who wielded a lightsaber with a green blade, and also possessed a shield.
This character, the Wanderer, made an appearance in the middle-grade novel Myths & Fables, released in 2019. The author, George Mann, stated that the possibility of the Wanderer being Qui-Gon Jinn was considered, but the true identity was left ambiguous.
Subsequently, in the graphic novel Hyperspace Stories: Qui-Gon, Jinn is depicted on Cerosha undertaking a separate mission involving the defeat of slovars; however, this appearance doesn't verify if he is indeed the Wanderer described in Myths & Fables.