She carries a replica pendant reminding her of a precious friend of hers which Akira recalls in his memories. So far it appears she is loyal to Mina, and it even appears it was her who got her on the hard candies. However this is revealed in the last episode to be not true, and is a follower of a Mina look-a-like who is the leader of Telomere.
SpoilerShe claims her measurements are 83-58-85 and that she is a virgin. She replaces Seiji Hama in his role as one of the three assassins; this is due to her ability with the shot gun, which is similar in technique to that of Seiji Hama. Her choice of the type of shotgun is also similar. Despite the fact that there are no female werewolves, this anime was made before Angel revealed this in the manga. Though this might also be because Mei Ren is a were-tiger of the Forest clan, as opposed to a werewolf of the Earth clan. She is killed by Akira in their final fight, but dies happily as she never thought she would be able to die while in someone's arms after being alone for so long.
Voiced by: Yū Kobayashi