Seffiron's Links
They look like brothers but they're really not. Sai is taller and older than Tama, so he's a sort of protector for the little guy, who has a tendency to get himself into tons of trouble.
Tama is much smaller and younger than Sai, so he really looks up to Sai. He also has a.......huge crush on him, but Sai totally doesn't know. Nope.