Post a character who reflects one o più of your sibling's personalities.
Nagisa Furukawa from Clannad always reminds me of my sister. Though my sister is less lighthearted and honestly più intelligent, Nagisa blames herself for everything and is always down on herself, yet very sweet and a good friend.
Naruto Uzumaki, I think is the most like my little brother. Just because of the silliness and immense energy, though. :)