They may have somewhat conflicting personalities but Kiawe and Mallow have an interesting relationship. Kiawe doesn't seem to like when others get close or physical with Mallow, which backs up the fact that there is an established close bond between the two trial captains.
This pairing is sometimes referred to as FlameBloomShipping.
— In the anime —
— In the games —
— Fan art —
My thoughts — It's an okay ship. I adore Mallow but I don't really care for Kiawe honestly. Jellow is my favorite ship for Mallow.