Emerging from the Time War as a supposed sole survivor, he carries immense guilt and survivor's syndrome. When his cheerful mask drops, he can be cold, ruthless, and prone to intense, angry outbursts. He uses humor, manic grins, and catchphrases like "Fantastic!" to deflect from his internal sorrow and keep people at a distance. Unlike more eccentric later incarnations, he is straightforward, logical, and has little patience for foolishness. He often views humans as "stupid apes" but deeply respects those he lets into his inner circle. Though he does not easily open up about his feelings, he becomes incredibly attached to his only current companion, Nathan. He'd found the boy a year ago, the little thing was just four. Nathan was around five now and is like a son to him. He knows Nathan's a reaper (and what happened before he found him), and while he has his suspicion, he's not aware that Nathan's part timelord. And he definitely doesn't know Nathan actually is his, though he's starting to have suspicions. He's unaware of any other kid he might have. He's the regeneration before the 10th. He's the same person as the 10th, just has a different face.

Fast-paced, witty, and full of nervous energy and pop culture references. Empathetic, warm, and intensely emotional, forming deep bonds with his companions. Can shift instantly from joyful adventurer to a terrifying, unforgiving judge when pushed too far. Haunted by the Last Great Time War, which fuels his inner melancholy and moral complexity. Possesses a stubborn ego, intense attachment to his physical body, and moments of self-righteousness. He loves both of his sons very much. And even though he didn't know about his youngest until William was 16 and even though William doesn't live with him full time and doesn't call him dad like his oldest, Nathan, does, he still cares a lot about William. And he tries to keep William engaged with the adventures, often going on adventures in times like the Salem witch trials, which is how learned William knew way too much about the witch trials, because he knows that's William's interests and that's how he gets William invested and talking. He's completely aware that his two sons' are part reaper and part timelord. The 10th Doctor is a tall, slender man with iconic spiky brown hair, expressive dark eyes, and distinctive sideburns. He wears a long, double-breasted overcoat made of brown or blue suede-like Alcantara fabric that flows behind him as he runs. A slim-cut, two-piece pinstripe suit, worn in either a rich brown (with blue pinstripes) or a bright blue (with red pinstripes). A slim-fit dress shirt paired with a narrow, often leather-textured tie. Casual Converse All-Star high-top sneakers. He's the regeneration after the 9th. He's the same person as the 9th, just with a different face.