Kumiko Kotoura

Haruka's mother.

Initially kind-hearted and caring, she becomes more and more stressed because she can't understand Haruka's special ability or deal with the situations it inadvertently caused. She reacted to her husband's increasing emotional distance by cheating on him, and when it is discovered that Haruka's father was also unfaithful, they divorce. She deals with her moral failings and weakness of character by rejecting young Haruka and disowning her.

At the end of the series, it seems that she is trying to get closer to Haruka again, though she is still reserved and confused about it herself.
(Source: Wikipedia)