Characters: Saber and YOU!!!
Setting: Room 1-01, floor 22, and floor 15
Format: Starting with action, but I'll match what others reply with!
Summary: Clearly the tower doesn't have enough Sabers.
Warnings: Likely to have spoilers for Fate/Extra I guess?!

( Room 1-01 )

( Floor 22 )

( Floor 15 )

Characters: Enoch and anyone!
Setting: Morning, upper dorm floors, lower tower floors, then everywhere else!
Format: Starting in prose, but I'll match you!
Summary: Enoch wakes up in an angel costume and searches for candy. You know, participating in the event.
Warnings: None yet!

( But he'll play along anyway )

Characters: Ken, any under 14 year olds, any adults who want to troll them.
Setting: Room 5-13, afternoon of the 11th.
Format: Whichever works.
Summary: Meeting three of the bitty brigade, on short notice.
Warnings: Explanations of terrible tower things.

( Heroes rise again. )

Characters: Haruhi Suzumiya and you!
Setting: Throughout the tower, October 10th-13th.
Format: Starting off with action, but I’ll follow you.
Summary: Haruhi is not pleased about being in a Queen of Hearts costume. Shenanigans occur.
Warnings: Abuse of language, violence. If anything more specific occurs, this will be edited.

( Floor 3 ◦ October 10th )

( Cafeteria ◦ Everyday )

( Monsters ◦ Everyday )

Characters: Shion and Elena
Setting: Room 2-09 backdated to the 6th October
Format: Prose
Summary: Shion goes to give Elena back her gun and apologise
Warnings: Mentions of terrible things ala Ganondorf and torture and stuff.

( Ganondorf was nothing; Elena she was terrifying )

Characters: Colette Brunel and YOU!
Setting: Around the tower! October 5th-9th!
Format: Either!
Summary: Colette takes the first few days to become familiar with the tower.
Warnings: Angst, mostly.

( Colette did not know what to believe. )