Jabal

Jabal was a member of the Assassin Order, the Bureau leader of Acre, and a Rafiq.

Characteristics and personality
Jabal tended to always be in a jovial mood; mentioned is that his eyes twinkled as he greeted Altaïr back into his assassins' bureau, also looking up as the former Master Assassin visited his bureau for the first time, pleasantly greeting him with a joke: "A little bird told me you'd be paying a visit.", refering to the messenger pigeon Al Mualim sent. He also seemed slightly easily entertained, as he smiled at this joke and let go of the pigeon, watching it with amused eyes.

He appeared to be very old - having a fully greyed beard - but still aware as to what exactly was going on around him; already knowing of Altaïr's failure at Solomon's Temple the first time the assassin came to the Acre Bureau.

Later, as Altaïr was about to assassinate Sibrand, Jabal apologized for his mistrust in the dedication Altaïr had to the Assassin cause, showing that there's more than just his humorful appearance.

Trivia

 * Jabal's name was only given Assassin's Creed: The Secret Crusade, in Assassin's Creed he is only reffered to as "Rafiq".

Source
Assassin's Creed: The Secret Crusade