As much as I love Octavia/Lincoln, I don't think I could pull him off so I might have to go with an OC from the 100 world or do a male character from another fandom if I can decide on one. What age range were you wanting the male so maybe it can help me decide?
But yeah, so before meeting Lincoln when she's more flirty, breaking rules, and doing her own thing to annoy her brother while still being a badass.