My inference is that Negi's father wants to spend more time with his daughter. So at this point he is actually being selfish.
Answer:
decrease
Explanation:
The verb to wane means to diminish in intensity, to be less brilliant or powerful, a bit like a to dim. So, decrease would be the best match to wane. You might have a dimmer control at home for some lights, to control the intensity.
Increase is the opposite of to increase of course.
Healthy and sick are not words that have similar meanings as wane, since they relate to living organisms, not lights.
The sentence is worded incorrectly. If you meant to say, "yesterday I woke up early" that would be the correct word. If you wanted to say "yesterday I woke up earlier than usual" that is the correct word to use.