Ice Pairing

Weiss : Elsa

Flynt : Dr. Freeze

In show pairing

Yang : Black Canary

Sun : Green Arrow

Demon Pairing

Ruby : Nekuko

Oscar : Shinra

In show pairing

Blake : Huntrss

Ilia : Mr. Incognito

I don't care if any of that was intentional or not I just find it neat.