Night shift guide mission! is a permanent Guide Mission Event in Blue Archive that provides various rewards upon completing certain tasks. This permanent guide mission is unlocked after clearing New Teacher Guide Mission and remains on the homescreen indefinitely until it's completely cleared.
In this event, players can collect the event item Coffee Mug to unlock Hina. If player already has Hina in their roster, 30Hina's Eleph and 50Eligma will be awarded instead. Players can also earn various rewards such as training materials by clearing the missions.
It is possible to complete the mission requirements up to 7 days in advance and collect reward immediately after the corresponding day is unlocked. Conversely, previous days missions can still be completed for the duration of event.