Octavia Blake wasn't the only second child on the Ark. Finn Collins was one also. Nobody knew because his brother sacrificed himself to get arrested. For some reason, his brother wasn't dead yet, even though he is older than 18. Guess your wondering who the brother is exactly. Alec Collins was his name. Alec was very disappointed when he found out that Finn got himself arrested, he wanted Finn to have a normal life on the Ark, well as normal as it can possibly get. Alec was very mad at Finn. Until he met the most beautiful girl he was ever seen in his whole life. Octavia Blake. Alec Collins wasn't afraid of anything. He could kill anything in a second from the skills he has learned from being in a cell. That was until he met Octavia's brother. Bellamy Blake. "Go Live Out Your Youth Years.'' - THE 100 - SEASON ONE BOOK ONE - YOUTH SERIES OCTAVIA - ALEC COVER - STILINSKI--

Bellamy Blake didn't know his neighbor from across the hall and wasn't planning on introducing himself. He also wasn't planning on kitchen fires, cat pregnancies, and ex girlfriends getting into bar fights. To him, it was all very unlikely.