Macha

"you look wet and tired, human child"

- Macha talking to Ben

"Oh you know nasty things, nobody needs them anymore"

- Macha talking about the feelings in the Jar

Macha (aka the Owl Witch) is the true but former main antagonist of the 2015 animated Irish film Song Of The Sea.

Information
Macha is a Owl who turned people's feeling into stone like her son Giant Mac Lir, and putted the feelings into jars to keep safe, she sends four owls to turn the Faerie creatures into stoen and take their feelings back to Macha.

Song Of The Sea
Macha was first mention by Ben to scares his little sister Saorise at night with a story of the giant Mac Lir and his mother Macha the Owl Witch, who turned him to stone and stole his feelings.

Later Ben then meets Macha, who has become obsessed with taking away bad feelings since her son Mac Lir wept an ocean-she took away his feelings and turned him into stone, creating the island near the one where Ben lived with his family. She has also taken to removing her own bad emotions, so that her body has partially been turned to stone, and is determined to do the same to Ben and Saoirse so that they need not "suffer" with bad feelings.

Ben manages to rescue Saoirse and release Macha's feelings back into her, which helps her recognize how wrong she's been. Unfortunately, being separated from her coat is causing Saoirse's health to deteriorate, so Ben sets out to get her home with help from Cú and the spirits of Mac Lir's dogs and Macha wishing them luck.

After the Faerie creatures from across Ireland rise and travel to Mac Lir's island, and Mac Lir himself emerges from it, Macha joins him and his dogs as they head to the spirit world across the sea.

Trivia

 * Macha is voiced by Fionnula Flanagan who also played as the Granny in the same film.