Kanlaon coiled around the mother fire raptor. His tail is coiled around the neck of the mother fire raptor while his body restricting the body. Even though Kanlaon coiled up to the mother fire raptor, it did not mean that the mother fire raptor is immobilized.
True to the level difference, the mother fire raptor could still exert some strength and bite Kanlaon but Sirius would sneak an attack or two on its legs. Sirius excels at fights that takes time because of his attack that can put the Bleed status. Saena would just heal any wounds that Kanlaon would take but she has not yet done that because the shield that Charon gave still persists.
