Elsa and Meili, Assassin Sisters' Dark Diary KILL 4

Elsa and Meili, Assassin Sisters' Dark Diary KILL 4 (エルザとメィリィ、裏稼業姉妹暗躍日報KILL4) is a Gamers shop exclusive limited edition short story that came with Volume 15. This was later adapted and included in the Re:Zero Ootsuka Shinichirou Art Works Re:BOX 2nd.

Characters

 * Elsa Granhiert (flashback)
 * Meili Portroute
 * Garfiel Tinsel
 * Mother (mentioned)

Summary
The story takes place after the The Emilia Camp's Great Evaluation Meeting. Meili's allowed to go to the former mansion to find traces of Elsa in exchange for being a prisoner and having Garfiel watch her. She has a flashback as she accepts Elsa's death.