Vivacity

[Sarah]

The quality or state of being vivacious. Specifically: --(a) Tenacity of life; vital force; natural vigor. [Obs.] The vivacityof some of these pensioners is little less than a miracle, they livedso long. Fuller.

[Greta]

Noun: [The definition] of being attractively [lively] and [animated].

[Julene]

(especially in a woman) the quality of being attractively lively and animated.