(Face Claim: Devon Bostick, from The Diary Of A Wimpy Kid and The 100).

Chloe's brother:

Name: Nicholas Zar, or Nick.
Age: 23
Appearance: Neat, dark brown hair, and brown eyes. Thin and scrawny, but not completely weak either. Average height, if not slightly taller. Looks like his father.
Personality: Good-hearted, selfless, very kind, quirky, tries hard never to be self-righteous, over-protective, can be unorganized, a little weird, and sometimes too hard on himself. He wants to work with younger kids and teach them.
Family: (look at Chloe's) He adores his little sister, and just wants what's best for her. He is afraid of disappointing his family, even though they're pretty supportive.
Backstory: Raised pretty normal, has two good friends, including his sister, and a human girl named Victoria 😏. When Chloe told him she was going to become "Enlightened", he became more afraid than he let her know, but helped prepare her as much as he could.
Flaw: He spends too much time thinking about other people over himself, and he doesn't like to admit when he has a problem, for fear of judgement and being a burden.

I forgot to add a Flaw to Vivian Dune. Her's was being manipulative and over sensitive. I'll give some other flaws for my other OCs:

Infinity is sometimes too trusting and loyal, and so other times she doesn't trust as easily as she should, doubting people she loves. Also her bouts of insanity and hostility.

Chloe can be overly self-righteous and reserved.