If this “person” is you why don’t you admit it?
I am curious as too why you don’t want to lift.
In answer to you question you will lose fat and quite a bit of muscle from catabolism. The study which the V-Diet is based on entitled Effects of Resistance vs Aerobic Traning Combined With an 800kcal liquid diet found that;
-Those that did resistance training had a much greater lean body weight at the end of the diet
-Those that did resistance traning also had a much larger Resting Metabolic Rate of 1800kcals/day compared to 1358 of the cardio group.
Although the amount of fat lost from the cardio group was greater. The fact that the RMR at the end was larger in the Resistance group means that they would find it easier to diet in the future as they wouldn’t have to sink there kcals as low.
But you can make up your own mind.