Throughout the production of a series, a lot goes on behind the scenes in regards to planning and design, which often go through multiple stages before resulting in the final version that is seen on screen. Some concepts and ideas can have an effect on the show and characters, and unexpected occurrences during production can also lead to changes and additions to the plans for the show.
Scarlet David alludes to Peter Pan from the novel Peter Pan in Scarlet, which acts as a sequel, in which Peter Pan has become the new Captain Hook. This allusion has had the following influences on the character and the show:
- His given name, Scarlet, comes from the title of the novel. His family name, David, comes from David Barrie, brother of Peter Pan author J. M. Barrie.
- He has a pirate motif with his outfit and his weapons.
- At one point in "New Challengers...", Scarlet is seen to perform a "flying" pose, similar to that of the Peter Pan from the Disney film adaptation of the Peter Pan series. He then performs a similarly Disney-adaptation-esque maneuver to stick a landing on the mast of the arena's ship, complete with comical melodramatic overbalancing reminiscent of Captain Hook and the playful Peter Pan.
- Scarlet's weapons Hook and Darling are both named after characters from Peter Pan. Darling being the last name of the three children protagonists of the story and Hook being the name of the Pirate Captain antagonist.
- Scarlet's Semblance,"Gliding" and the flying pose he made during "New Challengers...", is also another allusion to the story/movie of "Peter Pan".
- Scarlet's appearance is based on the appearance that G-Dragon of the K-pop group Big Bang had in their music video for the song Fantastic Baby.
Scarlet's emblem is a skull and a pair of crossed swords. This emblem appears on one of his possessions:
- Battle outfit - his belt buckle
Scarlet is first seen in the Volume 2 Opening as a 2D drawing, standing alongside his teammates. He is later introduced as a full 3D model in Volume 3, with one difference to his appearance:
- There is no longer a pair of chains holding his jacket onto his shoulder.
- Scarlet first appears as a 2D drawing in the Volume 2 Opening and then in a distance shot in "Extracurricular" because his model was not completed at the time. He makes his first appearance as a 3D model in the Volume 3 Opening and then "New Challengers...".
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