Martina Crespi is a fictional character from the anime series 'Strike Witches.' She is a witch and a member of the 504th Joint Fighter Wing, known as the 'Arditi Witch.' Martina is known for her calm demeanor and strategic mind, which makes her an asset in combat situations. Her magical abilities and flying skills are exceptional, allowing her to excel in aerial battles against the Neuroi, an alien race threatening humanity. Martina's dedication to her squadron and her ability to remain composed under pressure make her a respected figure in the series.