Road is the first Noah to appear in D. Gray-man, showing up during the Rewinding City arc to mess with Allen, Lenalee, and Miranda. She looks like she's barely a teenager, but she's actually the oldest Noah around—a detail that tends to surprise people.
Her powers are genuinely impressive. She can open doors to her own pocket dimension (shaped like a wrapped present, naturally) and slip in and out of reality at will. Inside that space, she has total control over everything—objects, terrain, you name it. Her go-to weapons are levitating candles that she can sharpen into stakes and hurl around like weapons. She can also regenerate from pretty much any injury and has telekinetic abilities when she's not in her dimension.
Personality-wise, Road is weird because she's simultaneously a bratty kid and genuinely disturbing. She needs constant entertainment and will bug Tyki or her parasitic pet Lero if she gets bored. She procrastinates on schoolwork and skips classes like any normal teenager, but then she'll casually stab someone through the eye or torture Miranda just to see them suffer. Fans often note the whiplash between her childlike tantrums and her casual cruelty.
Her family dynamics are surprisingly normal. She adores Tyki like an older brother, bickers with the twins in that typical sibling way, and doesn't really interact with Skin much. Interestingly, she seems to have genuine feelings for Allen Walker—she kisses him when they reunite, which catches even Tyki off guard since the only other person she's kissed is the Earl himself.
Being the First Child means Road was the first Noah to awaken this generation, which gives her exclusive access to programming Noah's Ark. She's clearly the Earl's favorite. She represents Noah's "Dreams." Her nationality remains unknown.
Content compiled by AnimeList.moe from publicly available sources.