Awoken Dreams- Magma

I'm planning on writing a story for publication, and I need characters.
The story plot goes like this;
Four normal kids (in groups of two) are taken from Earth and moved to another universe. Magic and mythology are the norm while science and technology are unheard of. They have to fight an ancient evil backed by four of the Seven Deadly sins; Pride, Envy, Sloth, and Wrath.
The people of this univers praise different gods, who is actually the same god in different forms. The elements (Fire, Water/Ice, Earth, and Wind) are the main focus of the magic.

I plan for two books. The first will be Magma, which'll be the Earth and Fire guys, while the second will be Storm, which'll cover the Wind and Water/Ice girls.

I have the four main characters taken already, but I need their mentors-to-be, townspeople, city councels, best friends, etc. If you want to be a character, drop me a message with your first name (last names optional), your character's first (and last name, again optional) and what element they serve.
And any ideas you might have would be very helpful as well.
Thanks!