An angelic attendant associated with Christ's Passion, frequently shown bearing, presenting, or adoring the cross and other Instruments of the Passion.
An Angel of the Passion is an angelic figure associated with Christ’s suffering and death. Such angels may carry a cross, lance, sponge, nails, crown of thorns, or other Arma Christi, or may adore the instruments themselves.
Etymology
Passion from Latin passio, “suffering.”
Sculptor Notes
Each instrument changes the pose. A long lance creates a vertical or diagonal axis; a cross creates substantial mass; nails and crown demand close viewing. The attribute should determine the angel's action rather than merely occupy the hand.
References
https://www.metmuseum.org/art/collection/search/191942