Rikiya's transformed appearance under the effects of Trigger is that of a large rotund ape with black shorts. Due to his brief appearance, what he looks like normally is unknown.
- Rikiya's name contains the kanji for "monkey" (猿 En?), "king" (王 ō?), "power" (力 riki?), and "to be" (也 ya?).
- Rikiya's surname, Quirk, and appearance may be a reference to King Kong. The pose Rikiya appears in his debut chapter is a reference to an iconic King Kong scene.
- Rikiya shares his given name with Rikiya Yotsubashi and Rikiya Katsukame.
- My Hero Academia: Vigilantes Manga: Chapter 94.5.
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