There is not a backstory for this dude yet mainly because he wont appear in Dragonball TT,this is fan art!!!!!! I saw a drawing while randomly searching the internet for Dragonball stuff and had to revamp the picture.This Arcosians name is Kryo, which can be said two ways :
Original- Kreeyo (Greek)
his name simply means Cold in Greek,if you've ever heard of cryogenics you'll understand that it involves the cold.
Here is the original scribble I was inspired by,if anybody knows who drew it,be sure to message me so I can thank them for this amazing transformation sta.sh/028hvmywqbol