Andrew's claws had a certain kind of burning effect. Once his claws made contact with any hard surface, that hard surface was guaranteed to melt from the high temperature of his claws.
Romeru's feathered swords had been destroyed repeatedly due to the high temperature that could easily burn through a metal plate but the temperature wasn't high enough to burn through his wings.
Seeing that his claws were not able to cut through the wings, Andrew slashed downwards towards his Romeru's leg.
Swoooshhh!
Romeru reacted by flapping his wings and dashing upwards with speed causing the claws to miss him.
Andrew didn't wait for a second after noticing that his claws didn't connect.
He leaped upwards immediately.
Fwoosh!
His body traveled across the air, crossing a height of more than five meters in a few seconds.
As he was catching up with Romeru in mid-air he slashed out again from underneath.