Ghost Transcendent is a dye for Ghost Armor. It is the reward for earning the Platinum Trophy. Like every dye it only changes colours.
Unlock every other trophy to earn the Platinum. The dye is then added to the Ghost Armor's options.
Once unlocked it shows up as a colour option for Ghost Armor, so you need that outfit to use it.
Adventurer's Fortune
Adventurer's Fortune is a dye for Traveler's Attire. It costs 10 flowers at the Izuhara merchants. Like every dye it only changes colours.
Amber Assassin
Amber Assassin is a dye for Ronin Attire. It costs 10 flowers at the Toyotama merchants. Like every dye it only changes colours.
Ancestral Force
Ancestral Force is a dye for Sakai Clan Armor. It costs 10 flowers at the Toyotama merchants. Like every dye it only changes colours.
Archery Master's Attire
Archery Master's Attire is a dye for Tadayori's Armor. It is a New Game+ dye sold by Baku the Voiceless for 15 Ghost flowers. Like every dye it only changes colours.