In Islamic tradition, Ridwan is the angel associated with guarding Paradise and its gates.
Ridwan, also spelled Rizwan or Riḍwān, is described in later Islamic tradition as the guardian or gatekeeper of Jannah. He welcomes the people admitted to Paradise and is often portrayed as its chief keeper. The name is connected with divine pleasure or approval, an idea closely related to the bliss promised in Paradise.
Unlike Jibril, Mikail, and Israfil, Ridwan is not named explicitly in the Qur’an. His role comes mainly from hadith reports, exegetical literature, and later Islamic storytelling. That distinction matters: Islamic beliefs about angels include both Qur’anic figures and figures whose names became established through broader tradition.
Malik is the common contrast in this question. He is traditionally described as the keeper of Hell, not Paradise. Israfil is associated with the trumpet of resurrection, while Azrael is commonly linked with taking souls at death.