Obi

Obi was formerly a mercenary and assassin who first encountered our protagonists when he was hired by Lord Haruka to prevent Shirayuki from entering the castle and meeting Zen and furthering her relationship with the prince. Surprised by her wit and bravery, and mildly curious about Zen, he hands himself over to Zen calling him "Master". Soon after, Obi is hired as Zen's attendant before being officially raised to being Zen's personal messenger and placed as Shirayuki's personal guard with an official Wistal Castle ID. He is later knighted by Zen as Zen Wisteria's Immediate Knight and given the position and duty as Shirayuki's guard in a more official capacity. He is confirmed to have romantic feelings for Shirayuki. You are shiraiyuki older sibling y/n instead on having red hair you have golden eyes that you covers with contacts