(For the OC Ask Game) Skullcrawler 13: Height ~100ft, Characteristics: has a tendency to analyze potential threats for weaknesses before attacking. Is not above fleeing if she judges that her opponent is significantly more powerful than her. Can only speak Skull-Island's language, but understands a fair amount of English and Chinese from being a lab rat of Apex (and is picking up a bit of Muto as well). Fears: Humans and lightning.
Now in a more realistic setting, both of my OCs would be terrified. Skull crawlers have tried to eat Anon before and these encounters stick in his memory. Himari would be terrified for her Cubs sake because of the previous encounters. Once again she’s not one to tear into Titans the moment they appear. She will give SkullCrawler 13 a chance to run away, but will not hesitate to attack if 13 gets too close. Most likely it will be the same as Bruce where SkullCrawler 13 leaves them alone.
If they did speak though, Skull Island would be similar to the language of the hollow earth. After all it was a similar environment. If 13 was nice enough and communicative enough Himari would not mind her. Actually if 13 showed no intentions of harming Anon and communicated enough, Himari may even get along with her. Both having tragic events happening in their past (Himari thinks Godzilla died and has no idea he is still alive) (13s experience with MechaGodzilla) and trying to protect those they loved, they would have a whole lot in common.
Anon would take awhile to get social with her being scared after past events. He would eventually warm up to her but would stay close to his mom. This fear would eventually wear off with the arousing curiosity that he would have. She would actually be a good experience showing him not everything that can kill or eat you is out to get you nor is it bad. Eventually he’d be asking many questions about the SkullCrawler some catching her off guard. Anon would appreciate the interaction and probably even teach 13 a thing or 2 about the Godzilla species. Things she might even need if the Alpha of the surface try’s to kill her again.