UN is on Ice Side, while ASEAN is on Fire Side. They are both males. (But you can switch their roles or change their gender though!)
They are both brothers/siblings. UN is older than ASEAN, and vice versa. They share what they have each other except powers. UN has icy powers, while ASEAN has fire powers.
UN is sometimes overprotective to ASEAN because he doesn't want to happen to his younger brother just like from his past as a father.
UN was once a father. He had an only child that he loves so much like its own treasure. His only child was the reason why UN is caring, soft, and calm. Until one day, the tragedy happened that makes UN gain his cold and icy powers. This is the tragedy where the child was killed by "that man" because of his jealousy to UN. So who's "that man"?
That man was created by UN from a golden mysterious mirror using his powers, and treated him like his new brother. That man's name was Reichtangle. So meaning that, Reichtangle killed UN's child? Well, yes, but indirectly. Reichtangle commanded his own minions to kill the child.
After that tragedy, ASEAN immediately found out that Reichtangle was cruel and evil. With the help of his powers, ASEAN fought with Reichtangle. ASEAN became successful, and he changed/transformed Reichtangle's character and identity. Because of that, ASEAN named evil and cruel Reichtangle as EU, the opposite of Reichtangle.
A week passed after that tragedy, UN's warm heart was now frozen, filled with hatred and coldness.
In the present time
ASEAN: Hey UN! I'll go hunting in the forest! :)
UN: ...
**ASEAN: UN...? I-i-is it okay to hunt...?
UN: Just be safe, ASEAN. I don't want you to get harmed.
ASEAN: laughs Look at you, being an overprotective mother hen!
UN: rolls his eyes Shut it...bro...I just want you to be cautious!!! I'm serious!!!
Later while UN is walking around the forest, he sees you.
UN: What are you doing here, kiddo?! Don't you know it is dangerous to live here alone?!?!