The recently released Re:Zero Alarm smartphone app fulfils your dreams of taking Emilia or Rem to bed.
Users are able to select up to three voice recordings to create their very own Emilia/Rem wake up call.
Available at an affordable price of 720 yen (US$7), the Re:Zero Alarm app, which comes in Emilia and Rem versions, is jam-packed with over 90 recordings voiced by their respective anime seiyuu (Rie Takahashi and Inori Minase), as well as over 30 character images which will be randomly displayed when the alarm goes off.
Among which, Emilia and Rem have probably garnered the most fans, as evidenced by the fact that they can now be eternally captured in your magical devices (i.e. smartphones) to wake you up at whatever time you order them to!