Grey
Grey gets unusually energetic when she's sick. She becomes surprisingly open and confident. She stays in her true form more often, although that could be due to the strain of shapeshifting. Her attitude goes up and she really tries to get involved. Something the Bulls would encourage if she was actually feeling well enough to perform the actions she volunteers for.
Grey spends her sick days limping around the base, eagerly asking to help with tasks far out of her ability while ill. She talks more freely and easily with the others and seems to become more bouncy in attitude. She has remarked once or twice that it could be because her shapeshifting body produces a byproduct of magic that makes her feel happy while it's battling illness.
Grey gets many of the symptoms when she's sick. Her attitude is energetic, but her movements are lethargic and painstaking. Her magic and body are weakened to a level where she can't do anything more than wander slowly and aimlessly around the base. Despite this, she still insists on helping the others in whatever mundane thing they're doing. Grey is kind whether she's ill or not.
There ya go!