Ancestral spirits (ali) are the primary object of worship at Kamasua, as is the case in other lowland Aboriginal communities. These include the territorial anzu, the household Alimu, and other divinities summoned by the local shamaness, the wangyi.
一如其他的平埔族，吉貝耍信仰為「阿立」（祖靈），包括社群性的案祖，私人家族的阿立母，或是女性巫師尪姨施法時的各種神力來源等。