Muggles' Guide to Harry Potter/Characters/Evan Rosier

Overview
Evan Rosier was one of the Death Eaters that were part of Lord Voldemort's organization. We believe that his father, only called Rosier, was also a member of the Death Eaters.

Goblet of Fire
When Harry, Ron, and Hermione were visiting Sirius Black in his cave hide-out outside Hogwarts, Sirius mentioned that one Rosier had been one of Severus Snape's friends, and he had been killed by Aurors the year before Voldemort fell.

When Harry is looking at Dumbledore's Pensieve, one of the three scenes he witnesses is Igor Karkaroff revealing names of Death Eaters in hopes that he will get his own sentence reduced. The first name he gives is that of Evan Rosier, and he is most disappointed that it is already known to the Ministry.

Half-Blood Prince
When Lord Voldemort, or Tom Riddle as he is then known, is seen in Albus Dumbledore's memories returning to Hogwarts to apply for the job of teacher of Defence Against the Dark Arts, Dumbledore asks him about his "friends" waiting for him in Hogsmeade. One Rosier, who we believe is Evan Rosier's father, is one of the friends mentioned by name, along with Mulciber, Nott, and Dolohov.

Strengths
We have little information about Evan Rosier's strengths, but they likely are involved with dueling and Wizarding battle abilities.

We can assume Evan Rosier was a very strong wizard who excelled on DADA and the dark arts, since he was able to duel one of the most powerful Aurors, Alastor Moody and take one of his eyes with him before getting killed.

Relationships with Other Characters
According to the author's genealogy chart of the Black family, Rosier Sr. was Druella Black's brother, making Evan Rosier cousins with the three Black sisters Bellatrix, Narcissa, and Andromeda.