Ichiko Saikou

She is Megami Saikou's paternal aunt and the former heiress of Saikou Corp. Not much is known about her but she is probably in her fifties. Starting from early childhood, she was given training to prepare her for the responsibilities that come with operating a company - training that became more advanced and intense with each passing year. Her father created Akademi High School specifically for her and customized the school to fit her exact tastes. After she graduated, she decided she didn't want to inherit Saikou Corp and instead wanted to travel the world to find her "sister". This enraged her father, as he had put a lot of time and money into her training. After a long, heated argument about her decision, it resulted in her father disowning her and her subsequently leaving. Her "sister" is implied to be the Fun Girl.