Yusei and Aki in various monster-inspired outfits by 肉ROU (@RRROU39) on X | tcgmode

I tried to find the source of who made it but I couldn't find anyone except someone who goes by 肉ROU (@RRROU39) on Twitter/X. But I can't them either there or on pixiv. Nevertheless, which of these designs do you like the most? Phoenixian Seed, Junk Synchron, Seven Swords Warrior and Scrap Iron...