Sentry (comics)
Sentry is the codename of several unrelated fictional characters of the Marvel Universe. Currently, the most prominent Sentry is Robert Reynolds, appearing in Marvel's New Avengers and Mighty Avengers titles, and the subject of two limited series.
Read more about Sentry (comics): Sentry 459, Sentry (Stewart Ward), Sentry (Robert Reynolds), Sentry (Val, The Galadorian)