Deep Crimson is Ultimate Asuka and Crimson Homura's Secret Fusion Ninja Art in Senran Kagura 2: Deep Crimson. It requires at least 3 ninja art scrolls from both of them to use. Like all Secret Fusion Ninja Arts, its power increases with the characters' mutual Affection.
The execution of this move is very similar to Flying Wild Dance, but to an extreme. Both Asuka and Homura take a stance before they both leap into the air at blinding speeds.
- The name of this ninja art is the same as the title of the game itself, Senran Kagura 2: Deep Crimson.
- Ultimate Asuka is the only person to have a Secret Fusion Ninja art with Crimson Homura.