Erebus

This is my newest OC, Erebus. He is the twin brother of Helios. Here are the differences:

Helios names comes from the Greek titan of the sun (or elios which is the Greek word for sun); Erebus name comes from the Greek god of darkness/shadows
Helios was cursed to dwell in dreams; Erebus was cursed into nightmares
Helios protects the golden crystal; Erebus protects the Eris crystal (Eris is a dwarf planet named after the Greek goddess of discord and chaos)
Helios is kind; Erebus isn't
The golden crystal is in the shape of a tear drop on Helios' forehead; the Eris crystal is in the shape of a heart on Erebus' forehead
Helios is the lover od Chibiusa; Erebus doesn't believe in love
Helios is the younger twin

I can't think of any of differences right now...