KnightingaleSong on Twitter: "Fanart for @wendycomics comic Castle Swimmer on Webtoons! I absolutely love Kappa and Siren ♡ #Castleswimmer https://t.co/wWL00ZC4Pj" / Twitter
Atom Astro Boy Kobunsha Kappa Comic Book no9 Japan Vintage 1965 original | eBay
Oh my surface god why did no one tell me about Wendy's old "Kappa" comic, which is literally what was rebooted into Castle Swimmer? : r/CastleSwimmer
Kappa | Castle Swimmer Wiki | Fandom
Web)comics Review — Kappa
Kappa Revolution (Volume) - Comic Vine
Castle Swimmer Kappa Siren | Webtoon comics, Swimmer, Mermaid art