I didn't immediately understand what was going on with CreatorVisual, but then I checked, and everything was already set up correctly there, and that section works normally (name and icon).

However, I thought that maybe it would be worth changing the link in Hydras to not point to a Manticore, since the link there goes not to the character but to the file of the Manticore itself,

but instead, change the link to the Manticore model within the Hydras, I think it might work + I still need to replace the LODs for the adventure map anyway.
I'll try it =)
I found my mistake, and fixed it. The problem is solved =)
Thanks to everyone who responded!