At the beginning of the show Eclipse was reckless and petty. Causing more of an annoyance towards the brothers though his recklessness did show as he created a Wither Storm.

Later on, he changed and became more manipulative and egotistical, often looking down on others, he considered inferior to him. He's extremely smart though his ego is often his downfall as he underestimates his opponents and people around him. He's controlling and self-absorbed. He has 4 arms, being around 7'11.