Hiru is a friendly Leech Girl. She can join you after a battle.
Hiru: "It's dark and wet, I could stay here for a while."
Melk: "Hello, Hiru. I wonder if it will be dark and wet today?"
Hiru: "It will damage my skin if these sunny days continue. I'm jealous of the slime you slugs have."
Melk: "Dark and wet..."
Hiru: "Dark and wet..."
Mimi: "It is painfully sunny today. You were not born in the ground, so it is not as bad?"
Hiru: "I only ever spend time in the shade. I also want to go underground, and not come out until it is dark."
Mimi: "Dark and wet..."
Hiru :"Dark and wet..."
Hiru: "You seem to be slimy... do you usually inhabit the rain forest?"
Cindy: "I have a strong body, so I can handle many different environments. I can live in tropical as well as arid areas."
Hiru: "Oh really? I am jealous... I wonder if I can also strengthen my body."
Cindy: "You'll just dry up, so you probably shouldn't try."
She is required in the "Overflowing Slime Stage" scene.