Attendant means something that naturally comes along with something else, or a person whose job is to help or serve others.

When doctors talk about the attendant risks of a surgery, they mean the dangers that naturally accompany that operation. Every major decision has attendant consequences: if you join the basketball team, the attendant commitments include practices, games, and travel. The word suggests these things aren't separate or surprising; they're part of the package. Fame has its attendant pressures. Success brings attendant responsibilities.

As a noun, an attendant is someone who assists others as part of their job. Flight attendants help passengers on airplanes, making sure everyone stays safe and comfortable. Museum attendants watch over exhibits and answer visitors' questions. Parking attendants help people find spaces and keep the lot organized. Gas station attendants (more common in the past) would pump fuel and check your oil.