Daisy is Marianne's pet catgirl. Prior to this, they were a man named Bill Deny, though his name was never mentioned directly in-game and was instead usually only called Scientist. He worked for the US as a scientist involved in research on the captured magico Strange Shadow. They are initially found in the Research Base during the Alaska Mission, and later appear in the hallway of Marianne's house.
Personality
Prior to being turned into the catgirl Daisy, this scientist was practical but cowardly, surviving the magico rampage by hiding behind a sofa in the break room. Later, upon meeting Marianne, his stammering excuses led her to declare him a coward as well, moments before transforming him into Daisy.
Now, Daisy is a light-hearted idiot, incapable of thinking about anything more elaborate than food, headpats, and laying in warm patches of sun.
Interactions
The scientist must be rescued and enlisted before you can complete the Alaska Mission.
Later, Daisy can be asked to help you break into Marianne's office, unlocking access to the Hallucination dungeon as well as the Maid Transformation.