I'm imagining a mithral suit of armor that's inspired by Minkaian o-yoroi but also by Gray Maiden plate - under the armor I'd dress you in red, but I wouldn't wrap the armor itself in anything too chromatic, I'd let the mithral show, except where we need red thread to lace lamellar plates, and maybe a red leather wrap for the upper half of the waidate... no, I think we leave the waidate unwrapped. The armor'd have long skirts like o-yoroi, and all of the plates, even the little lamellar scales, would be etched with intricate designs - I'm thinking animals and vegetation, especially flowers and especially the kind of flower you grow in your hair - which can only be appreciated from up close, but from further away they give a kind of texture that helps set you apart from the rank and file without being too obviously different in kind. You'd wear the red cloak and cape, and a tasteful number of rubies, nowhere where they're stealing the spotlight, just as tasteful accents, but you'd also have some green and earth-tone design elements as a nod to your old color scheme - but I'd want to rewrap your katana, swap out its sheath, and repaint the naginata - there's nodding at an old color scheme, and then there's keeping it. You wouldn't have the red plume on your helmet, though, I'd want you wearing some cool Tian-looking kawari kabuto, maybe with leafy antlers like that one pokemon you showed me, Sawsbuck. Maybe those should be made out of wood, and we could incorporate other pieces of wood in the armor? Or, nah, let's just do it all in mithral. Shiny mithril-silver antlers, mithril leaves, mithril flowers. Maybe designs on the antlers, like scrimshaw? Oh! And some of the etchings on the antlers and armor could be various grass-type pokemon! No one on Golarion would get it but the two of us; to everyone else they're just weird monsters. Most of the etchings should be real plants though, people looking closely at it should think vegetation and strange beasts, not strange beasts and vegetation. The face plate would look like it came from a set of gray maiden armor, but there'd be etchings in it to give that texture.
Under the helmet, things get tricky because of your fast healing. I think I'd go crazy with piercings, maybe with some chains to connect them. Or maybe just one chain, from your nose to your ear, for that asymmetric look? Oh, and I could drill holes in your skull for swappable studs, or just screw in neat-looking things! A ruby or an emerald between your eyebrows? No, let's stick rubies in over your eyebrows, near your temples.