Characterization of Jenna

In the following passage, the protagonist is introduced: 'Jenna was always the first to arrive at the school basketball games, her cheerful laughter ringing out as she greeted everyone. She wore bright colors and had a knack for making people smile. Her friends often relied on her for support during tough times, as she approached challenges with unwavering optimism.'

Based on this description, what can be inferred about Jenna's character?