Teenager (The End of Time)
From Tardis Wiki, the free Doctor Who reference
The Teenager, who is played by Max Benjamin and his character's name who has not been giving yet, is a minor character from The End of Time (TV story). He lives with Ginger on a construction site. There they met The Master and they saw he was Harold Saxon. But The Teenager, along with Ginger was killed by The Master and was eating up by The Master.