As you can see both teacher and student are still sparing. Allen keeps firing at Fiona while she easily dodges those bullets. But the thing was that one by one Allen increased the power behind Those bullets and you can see that compared to before the speed of those bullets already increased very much.
But he could also see that attacking like this he won't be able to do anything to her. So he was thinking about using his ultimate attack without using his other techniques. But before that, he needed to use his full spiritual energy and he was getting ready to do that.
All this time Fiona also wasn't ideal. She also attacked him and as you can see he was already injured because of those attacks. Fortunately, none of those attacks made him seriously injured but still, he could feel the pain because of those attacks. The power behind Those attacks is really powerful which makes him injured.
