Kuchinawa Haruka

Kuchinawa Haruka (朽奈和 ハルカ) is often in the presence of L. Apparently, Shoujou sees her as his rival, as he often wiretaps L to see what Kuchinawa and L's conversations are about.

Kuchinawa is female, and is actually Kawazu Tamao's mother.

Role in the Story
Kuchinawa is one of the six seal weapons, and is owned by L.