This is easy but what is sub zeros real name

His real name is Bi-Han

Explanation:

Bi-Han

In the reboot continuity started in the 2011 Mortal Kombat game, the original Sub-Zero's birth name is revealed to be Bi-Han, and his younger brother's to be Kuai Liang. Both incarnations of Sub-Zero are depicted as warriors from the fictional Lin Kuei clan who possess the innate ability to control ice in many forms.

select the word from the list that best fits the definition unreasonably stubborn

nothing. let it run its course