Deep squats and lower body fat percentage
Go heavy with low reps. You can do that with just your body weight too. For instance if you can get to 20 deep squats, go for assisted pistol squats, and when you reach 15 reps per leg, go with unassisted pistols. Then there are many variations of each exercise which may be interesting. The most important thing is that you eat 1-1,5g of proteins per kg of bodyweight (if you weigh 57kg you should take 57g - 78,5g of protein per day), workout 6 days a week with at least 48h rest for each muscle group to the next session (Monday pulling muscles, Tuesday push muscles, Wednesday legs, Thursday pull...) keep a low rep range and go heavy (3-4 sets per 8-12 reps).