Post a Master and Servant

Ciel and Sebby~!!!

Hayate and Nagi!
From Hayate the combat butler
X3

Beatrice and Ronove

Majin Tantei Nougami Neuro: Demon master, human servant.

Kuroshitsji: Human master, demon servant.

Hellsing

Alucard is Seras master
Integra is Alucards and Seras' master

Claude Faustus and Alois Trancy
Sébastian Mickealis and Ciel Phanthomhive

Ritsuka & Soubi - Loveless

Tomoki(master) and Ikaros(servant) from Heaven's lost Property

Orochimaru & kabuto from naruto

Shinki and Yumeko

It's not an anime (at least, I don't think it is) but I'm gonna post Cain Hargreaves (master) and Riffael Raffit (servant) from Kaori Yuki's "Godchild" and "Count Cain" series. It's a really good manga; I wish it were más popular. Cain is the dark-haired, shorter one, and Riff is the tall one with the blue-white hair.

Ciel Phantomhive & Sebastain ~ (Why the Hell did I forget Sebastain's last name? Sorry!)

♥ Alois Trancy ♥ & Claude Faustes...?

Kagami Risa and her master Matsudo-sama from the anime Kekkaishi!

Haji and Saya. Who can compete us ^_^