Finally came up with a proper name for my large slugcat, Their name is The Custodian.
And my other main slugcat The Navigator Is here for scale as well.

The Custodian gets their name from the fact that his big tail ends up picking a bunch of items up as he walks, And also he takes care of a small tribe of slugcats as their pseudo leader but he doubts he can be a good leader for them... But that won't stop him at least doing his best in providing food for them all so him in Nav head out into the open ruins In a search of food for themselves and all the others.