Hidan Laser- Similar to Aria, Kou can use her "Hidan" power to fire a laser out of her eye about .5cm in diameter. It destroyed almost anything in its path, however it needs 24 hours to recharge between uses.
Spear Proficiency- Considering Kou's only weapon outside of her "Hidan laser" is her spear, it's believed that she is very proficient in using it.
Hand-To-Hand Combat- Kou's Hand-To-Hand combat skills are impressive. Being able to duel Kinji to a standstill while in Hysteria Mode.