Dimension Linker
Full art:

Design:

“Main color: Blue ([Duel] Links’ emblematic color)
Accent color: Orange
Regarding the design: It incorporates the [Duel] Links Gates, keys, blue background and [special] effect components”

Weapon and outfit:

Key: “The key for the [Duel] Links gates, modified into a rickrack sword”
Outfit: “Futuristic look + cloth fluttering”

Description:

Creates Gates and uses them to cross dimensions (protects the peace across each dimension)

Background:

“[I] made it similar to the [special] effects of the Gates”

Source (around the 1:27:30 mark).