Michael Bluth is the second oldest Bluth son, but the most competent one.  When George Sr. went to jail, it was Michael who was stuck running Bluth Company and keeping the family together.  Michael's wife, Tracey, died of ovarian cancer two years prior to the first episode and left him to raise George Michael on his own.

Michael Bluth Quotes

Mrs. Featherbottom: Ok, who'd like a banger in the mouth? Oh...right, I forgot; here in the states you call it 'a sausage' in the mouth.
Michael: We just call it a sausage.

Maeby: Do you guys know where I can get one of those gold necklaces with a "T" on it?
Michael: That's a cross.
Maeby: Across from where?

Arrested Development Quotes

Okay, we are just about ass-to-ankles back here, Maeby. Do you want to hop on your cousin's lap there, please?

Tobias

(holding stuffed animals) These are my awards, Mother. From Army. The seal is for marksmanship, and the gorilla is for sand racing. Now if you'll excuse me, they're putting me in something called Hero Squad.

Buster