The dictionary meaning of the word "agenda" is "a temporally organized plan for matters to be attended to" or "a list of matters to be taken up (as at a meeting)." The third meaning is "individual objectives or perspective."
It appears that you have confused the third meaning given above with the concept of KRA. Now let us come to the definition of KRA. Following are the definitions of KRA:
Definition of KRA
KRA is the area identified as important or crucial where a result will assist in the achievement of the set objectives or goal, OR KRA defines what a job is expected to accomplish.
KRAs are derived from the company's vision/mission, annual goals, expansion plans, and so on. Therefore, KRAs are generally set by the superiors. In view of this, your agenda cannot override KRAs. That would be risky. Theoretically, you may have your agenda on and above the department's KRAs. But then meeting both would exert you, and very few will be able to fulfill double expectations, one for the senior and another for personal.
Thanks,
Dinesh Divekar