The Spirit in a Transitional period

The Spirit in a Transitional Period
The Spirit in a Transitional period is ghost with a mysterious past Yayoi raises throughout the series

Abilities
Unlike most ghosts, the Spirit uses physical combat the most, it uses its strong arms to hold down its target while he eats it, after graduating its physical strength becomes large enough to rend the earth with a simple punch

Its curse involves creating a jet black arrow, when impaled in its target the arrows weight gradually increases until it crushes the opponent

Trivia

 * The ghost was much stronger in the past, but something happened causing it to lose its strength and memories of its life, as Yayoi feeds it ghosts they slowly begin returning.
 * In the original one shot, it plays the role of Kuubo, taking away the soul of Yayoi's mother.