How do angels participate in the work of redemption?

Angels are not redemptive beings, as they are not redeemed by the blood of Christ, yet they are deeply concerned with God's plan of salvation. They function as messengers and servants who aid believers in their walk with God. Luke 15:10 indicates their involvement, stating, 'There is joy before the angels of God over one sinner who repents.' This illustrates that angels not only observe the redemptive process but take delight in the work God is doing in the lives of individuals, affirming their significant role alongside the work of Christ.