Complex sentence: She serves as Anko Team's driver after joining the team during their first practice battle and being the smartest student among the class, she could read the manual of any tank on the fly and drive it perfectly.
Split into simpler sentences: She serves as Anko Team's driver after joining the team during their first practice battle. Being the smartest student in the class, she is shown to be able to read the manual of any tank on the fly and drive it perfectly.