I made him as a suitable mate for her. He's certainly better than Flash Sentry. Feel free to delete this. Cause it sucks. His cutie mark means he can vanish in a puff of smoke and can only be seen on reflective surfaces. He got it from standing in front of a mirror and wishing he could just disappear from everypony so he wouldn't have to deal with them anymore. I have stories with him on my deviantArt account. I'm just suggesting it. Sorry.
Rhodes is a blue male unicorn with a gold mane and tail. He lives in the Golden Oaks Library with his wife, Twilight Sparkle. He is sarcastic and short-tempered but good-natured. Rhodes is a former co-captain of the Canterlot Royal Guard but retired due to injuries.
He was walking through Ponyville's market and bumped into Twi. He coldly ignored her and went home. Over the next few weeks, though, he couldn't shake her from his head. He was entranced by her beautiful lavender coat and mane. They awkwardly met back up and decided to go on a rather awkward date. Rhodes, who grew up alone on the outskirts of Ponyville, fell for Celestia's best student. He told her he loved her and she reciprocated.
He came from a broken home. His dad was abusive to him and his mom. Rhodes' mom died from suicide and his dad died from a heart attack soon after. Rhodes raised himself on the streets and outskirts of Ponyville. He wants to belong to a family that loves him and that he loves.