Dan Lewis

Daniel Lewis, Dan for short, was a Liverpudlian companion of the Thirteenth Doctor. He joined Yasmin Khan in the TARDIS as they faced the Flux, an unforeseen threat to the very structure of the cosmos.

Life in Liverpool
Following the 2021 Dalek civil war, that New Year's Day, Dan's friend read out Dan's horoscope, which foretold that Dan, an Aries, would find surprises later that year, that the colour blue and the letter D would be important, and that thirteen would be his lucky number. He was told to be prepared for action, and to remember that, no matter what, it wouldn't be the end of the world. After his friend finished, Dan closed the rear doors of his Ford Transit, turned, and smiled. (TV: Welcome to the TARDIS...)

Dan volunteered at a food bank, and refused to take home soup for himself when offered, though he had no food at home. (TV: The Halloween Apocalypse)

Travelling with the Doctor
On Halloween night, 2021, Dan was kidnapped by Karvanista, who intended to rescue him from the Flux. He found himself on Karvanista's ship. The Doctor and Yaz came to rescue him, and took Dan aboard the TARDIS. (TV: The Halloween Apocalypse)

Both Dan and Yaz were studiously operating the TARDIS when the Thirteenth Doctor sent a distress call about the arrival of the Flux. Dan then called out to the Doctor, saying that he and Yaz needed her help. (WC: The Flux is Coming...)

Personality
Dan considered others' needs often before his own, volunteering at a food bank and giving out treats for Halloween while he did not have food for himself at home.

According to his colleague, his continued refusal to take food home was a matter of pride. (TV: The Halloween Apocalypse)

Skills
As part of the crew, Dan played his part in operating the controls of the TARDIS control console. (WC: The Flux is Coming...)

Behind the scenes

 * As Dan Lewis is said to be an Aries, this would place the character's date of birth from 20 March to 21 April, if the Zodiac of the real world holds true in the Doctor Who universe.
 * Dan appeared in the invalid webcast A Message.