Laila, also called Lyla, is a half-human, half-angel celestial being apprenticed to the Head Angel Nanael. Originally from a terran world, Nanael recruited her and brought her to Heaven for training. Her core duty involves conducting divine purification missions, employing holy milk as a weapon against earthly corruption.

She possesses blonde shoulder-length hair and purple eyes that transform into gold when activating her "Angel Mode." Standing approximately 164 cm (5'4") tall, her attire consists of a distinctive red hat adorned with wings, a white breastplate, a red-and-white skirt, and open-backed panties. Laila relies on the artificial wing apparatus "Nephilim's Plumage" for flight and combat, as her hybrid physiology denies her natural angelic abilities.

Her personality presents a contradiction: outwardly cool-headed and responsible, she exhibits a "my pace" attitude that allows her to resist Nanael's whims. Yet, frequent mistakes and a tendency to forget tasks mid-execution reveal underlying incompetence or absentmindedness. This flaw manifested when she absentmindedly plucked all of Nanael's feathers during a massage just prior to a critical mission.

In combat, Laila wields the "Heavenly Rifle" to spray holy milk for purification at medium-to-long range. The Nephilim's Plumage serves as a close-range melee weapon for stabbing and slashing. She also utilizes "Holy Poses" as part of her angelic techniques. Her combat parameters prioritize bravery (rated 4/5) and potential (5/5), though she scores low in resourcefulness, leadership, and experience (all 1/5).

Her backstory centers on a mission assigned by Nanael: purifying the Marshland Witch's expanding influence on earth, deliberately given with vague instructions. Despite her uncertain competence, she accepted the task without question. The feather-plucking incident underscores her tendency to act decisively yet thoughtlessly, highlighting her paradoxical nature as a divine enforcer.