Ryan Sinclair is a companion of the Thirteenth Doctor. He worked as a warehouse worker, earning money while studying for his NVQ so that he could become a mechanic.

As part of Team TARDIS, Ryan often acts similarly to  pupil to the Doctor due to his impulsive behavior and willingness to learn; he listens to her rules and follows her antics if they seem fun. He's grown to understand the Doctor well enough to explain her thoughts and actions to people outside Team TARDIS.

Preferably someone who sounds similar to Tosin Cole.