They really are best friends. They do everything together. Follow each other around, always doing the same things. They really compliment each other well, both having different personalities that seem to work really well with each other.
Julian (left) is a protector of sorts of his brother. He brings him toys, helps him with things, laughs at his jokes, humors him. You can tell he's concerned when Isaiah cries. He's very in tune with feelings. He's a good brother.
Isaiah is a goer. He goes. He does. He wants. He knows what he can get from his brother and when he needs to back off and let Julian take the lead. But he's always showing love to his brother, eager to give kisses. He's a good brother.