The Lava  Unicorn

Clearly, the lava unicorn, which spits lava balls everywhere, lives in a melting castle.He lives in a melting castle with lava/fire pits surrounding it.

Obviously,  his body  is surrounded by lava with a maxed out lava suit that he wears every day. His favourite food is lava/fire chillis that he eats every day. Dangerously, he spits out flaming lava balls whenever your near him.

The Colourful, unicorn

Obviously, the colourful unicorn, which sprinkles sparkles everywhere, lives in a rainbow. He loves to eat rainbow sweets/cakes but can’t eat anything else. He’s is never moody and never makes anyone feel left out.