Lukiel excels both in physical damage and in a supportive role. Her skills sport a long hitbox ahead of her, which usually means she can reach out and stun enemies before they can land any blow on her.

Her S2 will damage everyone around her in a wide area, while her S3 is ranged and can be used to snipe faraway threats.

Support-wise she has access to the ever useful Healing Wind early on, eventually switching to Magic Castle and Grand Regeneration to keep your party alive.

The reason she's not in S tier is because her tree is lacking in useful passives, aside from her hidden ability: Archangel's Blessing (which she shares with the featured Ark, something that will become the norm for most banners going forward).

Her Ultimate is also lackluster, serving as a debuff/ailment cleanse but not much else. Thankfully her overall damage output and resourcefulness still earn her a well-deserved spot on A+.