|Manga Debut||Chapter 234|
|Anime Debut||Episode 162|
Dolphin Edge is an attack used by Basil's Box Weapon Alfin. Rain Flame projectiles shaped like edged weapons are gathered on Alfin's fins and are then shot forward. Since these projectiles are infused with Rain Flames, Flames that have the "tranquility" characteristic, the shot can tranquilize the target.