"A fancy gilt key taken from a corpse in first class cabin 101.
1st class key is a key item in Resident Evil: Dead Aim.
The purpose of the key is to open up the door to East Passage 1 2F. Picking it up will also trigger event where the player encounters their first zombie when they walk back through the room, and also spawn zombies Guest Room 1.
The key is found on a corpse in cabin "101"'s private hallway.