Mary Isana White is a side character on Conception 2. She is first introduced to the Main Character on one of Fuuko Amicus's bonding events. She doesn't remember who or where she came from but she definitely knows that she is a ghost. She haunts the pool that the Aquatics Team regularly uses and only comes out when the moon is out. She is commonly refered to as "Ms. Ghost" whenever Fuuko or the Main Character speaks to her until near the end of Fuuko's story arc.