That seemed like a close call, but for some reason the panther-like Adandara monster didn't attack her. I guess it's intelligent enough to realize she's the master of the slime that healed it and did not harm her out of gratitude? I don't think it has anything to do with her being a tamer, at least not yet.
I feel the same Ivy, I had hoped she'd be able to tame it but I guess it's just too early. Would've been awesome if she had that panther-like monster to help keep her away from danger.