Bleach

Bleach:The story opens with the sudden appearance of Soul Reaper Rukia Kuchiki in Ichigo Kurosaki's bedroom. She is surprised at his ability to see her, but their conversation is interrupted by the appearance of a "hollow", an evil spirit. After Rukia is severely wounded while trying to protect Ichigo, she attempts to transfer half her powers to Ichigo in order to let him face the hollow on equal footing. Ichigo instead unintentionally absorbs almost all her energy, allowing him to defeat the hollow with ease.