be in (one's) element

To be doing something that one is very comfortable with or proficient in. My mother is in her element in the kitchen and can make just about any dish.

Common Names:

Name	Pronounced	Usage
Yehudi	-	Hebrew, Biblical Hebrew
MaËLys	-	French
Nanako	nah-nah-ko	Japanese
EilÍS	IE-leesh	Irish
Royston	ROIS-tən	English (Rare)
Epimetheus	-	Greek Mythology