The animate causee in Teochew kə-causative is incompatible with many agentive modifications, despite being the subject of an embedded activity verb. Similar phenomena show up cross-linguistically but remain understudied. I argue at least in Teochew kə-causative, the causee is still introduced by VoiceP with an initial AGENT interpretation. However, its interpretation is further modified by the causal event structure influenced by a volitional modality encoded in the causative verb. The causee, after compositional computations, is contextualized into a Prospective DOER with a much-reduced agency, therefore cannot be modified by many agentive modifications. This study supports a contextual approach to argument thematic interpretation, by adding a less studied external argument to the list, and shows the causee can have more complex contextualization conditions than other external arguments when it comes to thematic interpretation.