It'd be extremely useful to have the option to add a nickname to Sylesties that would overlap the semi-permanent names they've already been given/or not given.

For example, to label mission pets as such without having to give them a name like 'Strength' or 'Dex'. Or for breeding purposes, to label the amount of visibles or carries.

If you disagree, please explain why.

I don't have a current opinion on the idea. But to give you an idea maybe for future pets, I use a title plus name for mission pets. This is what I use. You could be a lot more creative than me.

Strength = Strong
Intelligence = Clever
Dexterity = Adept
Agility = Agile
Health = Stout

So some of my pets have names like Stout Sewati, Adept Adalia, Clever Cadence, Agile Archimides, Strong Silvana.