Dave (The Highgate Horror)
From Tardis Wiki, the free Doctor Who reference
Dave was Jess Collins' boyfriend. In 1972, while looking for the "Highgate Vampire" in Highgate Cemetery, he was killed when a Corvid drained his psychic essence. (COMIC: The Highgate Horror)
Jess and the Twelfth Doctor both remembered Dave's death six months afterwards. The Doctor apologised for this because of the way death seemed to have a habit of following the Doctor around. (COMIC: The Pestilent Heart)