Why not an origin story for how she got involved in streaming?
>Mori diligently doing her duties, as she always does
>Assigned the soul from a girl in her mid-20s, easy enough
>The order says the human is very sick and is quickly succumbing
>Mori portals into their apartment
>There's machines in the room, pill bottles, other medical stuff
>The soon-to-be deceased is sitting at her computer and cheerfully talking
>Mori looks and thinks 'Is she on a call with someone? No.'
>The monitor shows some animated character reacting to the girl's words and movements
>The girl starts to cough, mutes as she has a fit and mutters to herself, then unmutes, telling those in a chatroom "I'm okay. Thank you for asking. So about net week's karaoke..." she continues on
>It happens again, coughing which becomes worse
>The next time the girl mutes, Mori sees it fit to introduce herself
>Ahem "Hello, I am Calliope Mori. The Grim Reaper's First Apprentice."
>The girl jumps a little but turns her chair around, "Grim Reaper? You mean, I'm..."
>Mori gives a sympathetic look and nods, "Yes. Your time has come and I am here for your soul."
>The girl looks down sadly for a few seconds, then looks at Mori, "Can I say goodbye to them? They're like my family." She gestures to her screen
>It's not a busy day, Mori agrees
>The girl wipes her eyes and unmutes "I've got to go... Thank you! Everyone who supported me! You guys are some of my best friends. Please remember me and keep having fun. I... we'll meet again, someday!"
>The stream ends, the chat is a flurry of messages
>The girl says "Thanks.", calms herself and closes her eyes
>One swing and it's done
>Mori cradles the soul in her hands for a few seconds then releases it as it takes the form of a spirit
>The spirit asks "What now?"
>Mori gives a warm smile and takes her hand, "I bring you home."
>The two start to walk into a portal which brings them to the Underworld
>Mori asks "What was it that you were doing?"
>The spirit answers "Oh, that? That's called Vtubing..."
>The portal closes
