I'm surprised this hasn't shown up anywhere, the idea of a slug cat that is themed and developed based around the idea of looking for and then looking after little pups. If she was to have a campaign, it would happen in the time a little after Gourmand's return.

On her own, she'd be a relatively normal slug cat, maybe with a bit faster base move speed and a bit more food requirement. She's a healthy Slug cat who is out exploring on purpose and that purpose leads to her next ability. If she has none or only one pup with her there's be a map ping or something 'tracing the tracks' of a nearby slug pup.

But with a pup on her back or in hand, she'd change. She would move slower in general, similar to Gourmand, but she'd be slowed down by her babies, not her gut. Pounce jumps would go further and her spear strikes would hit harder. She could maul enemies but also turn food pips into edible items for her pups.

Pups being kidnapped might do some interesting things. Maybe spear tosses go through lizard helmets? Perhaps an agility boost to catch up with the kidnapper.

Visually she might have a thick mane of fur around her neck to give the pups something to hold onto. Whether this would do what manes do in real life and give her more resistance to bites is another thing.

The stat bonuses don't need to be huge. Rivulet and Gourmet give good examples of a stat spread without making the game too easy.