She is a bundle of Energy - is a metaphorical phrase we use to describe some one who is dynamic;
Bhagavad Gita mentions that this Energy description is not merely metaphorical , its Physical - real!
This Prakriti - Universal sphere we live in is a Field of Forces :
see the illustration above;
Human who is the integral part of this Universe - then -
is a bundle of these Energy states:
And what we call as someone's Personality is merely an Integral view of this field of forces:
All these three states are present in the same person ;
and the personality that emanates , is the superior among the Energy states that we exude: