Mysty

In-Game Information
Mysty is the third monster encountered in the game. Mysty is a very slow enemy encountered when you return to Sector 1 after you get a code from Sector 3.

Quoted Information/Backstory
The backstory of Mysty is unknown, as there are no notes that mention it directly other than the note found next to the code door.

"CAUTION - Mysty Containment Area"

"Look up."

Music
Mystic Flutes