A whole year ago my bf and I started roughly brainstorming a Borderlands x Bullet Train crossover AU that we started looking at again while playing BL3 recently :V
Vasi's (the Son) dad is a bandit warlord weapons manufacturer, and the Twins are bounty hunters more than vault hunters. Something something they're hired to rescue Vasi from a psycho camp that ambushed and kidnapped him n his friends.
At some point in the rescue process the three stumble upon a eridian artefact that inflicts siren powers on Vasi and Tangerine when they accidentally touch it at the same time. Vasi's father is known for seeking out sirens so now the Twins cannot take him back, and are on the run w him from his own family (Vasi is not thrilled at being re-kidnapped, in a way, and makes the process petulantly unpleasant bc what is the POINT without obnoxious enemies-to-lovers Tangerine/the Son)
Instead of an oni mask I was trying to go for smth based off a saurian, the shield design is a call to the slant on the orthodox cross. His shirt is a joke reference to the bloody eyes and momomon glasses from the movie lmao I need to do a side view of the mask to better depict the curvature bc the 1st go at the design is just laid 'flat' so I could detail work it at the time