竜宮院聖哉
One of the main protagonists of [[Kono Yuusha ga Ore Tueee Kuse ni Shinchou Sugiru]]. He is the titular overpowered but overly cautious hero, and known for his catchphrase "Ready Perfectly".

h4. External links:

* "Cautious Hero Wiki: Seiya Ryuuguuin":[https://cautious-hero.fandom.com/wiki/Seiya_Ryuuguuin]
ryuuguuin seiya