"What a kind child you are, Dororo." ― Okaka, Episode 13[source]
Okaka is a young lady who lives in a small cottage which Dororo and Hyakkimaru encounter along their journey. She initially appears to be a kind, compassionate individual, allowing the two to stay in her cottage for shelter. However, she is, in truth, a vengeful spirit of a Buddha Statue carver who lived a very long time ago, resurrected by the stone Fudo Buddha statue which she carved in her previous life to find a perfect face for it.
She was killed by the same statue she carved with the blade it carried.