lithe

Sounds like "light" and something which is light in weight can easily be moved and bended.

remember Blithe(careless, light hearted, flexible)....both means almost the same

Rearrange the letters HE is LIT(light) so he can move or bend with ease

The word lithe resembles to Lithium is a soft, silver-white metal that belongs to the alkali metal group of chemical elements.