the seven brothers all obsess over their human guest. Listed in order of age
Lucifer is the avatar of Pride, he's stoic and prideful 
Mammon is the avatar of Greed, he's bold and reckless
Levi is the avatar of Envy, he's shut-in and obsessive
Satan is the avatar of Wrath, he's quiet and a bookworm
Asmo is the avatar of Lust, he's flirty and touchy
Beelzebub is the avatar of Gluttony, he's kind and loving
Belphegor is the avatar of Sloth, he's relaxed and sweet