You have have to find her location by using the computer. It'll get a signal from the camera she stole. Then you just go to the location. (Behind the curtain in the infirmary.) If you've done that and the quest is still telling you to look for her it might be bugged.
Yeah the golden orb thing and hide and seek are different quests unrelated to each other. It's a sequence overlap. Have you gotten the CG from the Doctor and the corner of the desk yet? If so hide and Seek is essentially done for now. If Willows boss hasn't shown up then likely it's the werewolf event that stopping it. (Click on the bushes next to the tea table in the park to initiate.)