2 ideas

since there is a grenade in real life that can release a freezing gas

So how about a grenade called the cryogrenade that can have a chance to freeze people with a hit, and deal damage

My other idea (kind of a 2 parter)

The big torp has a smile, what if when it explodes, it leaves a blast wave that has a smiley face in the middle

And for the swift and tri torp,

Make the Swift torp a winky face because winks are sneaky and so are swift torps
Tri torps can be the goofy face because there’s three of them

Anyway that’s all I got for now

 

Rip frost items
The grenade sounds pretty cool though

 

Childish

 

Well it’s something