Zian was still kneeling with the professor, both to check on him and the fact that he wasn't sure his legs would fully support both him and Xavier at the same time. As Giselle offers help, he nods quickly.

No need to give the man any more injuries by dropping him after all of this.

The fact that someone was still hurt was important to the medic, however, and he waves for Toushirou to get closer. He might have one zap more in him to deal with that.