Sienna Khan is the High Leader of the White Fang and a Bengal Tiger faunus 

Sienna is one of the White Fang's first advocates for using fear and violence to overcome human prejudice towards the Faunus. She initiated this method, believing it necessary to make mankind regard them with fear to demand respect. Having personally created this change and becoming the leader of the White Fang, she was strong and willing to be violent, but not to the extent of hurting her cause on a global scale. She is easily in touch with her anger, but did not let it overrule her judgment. Her strength and independence are also very clear as she refuses to be swayed by wiser thoughts.