Lute

Lute is Adam's lieutenant and stoic subordinate who is always by his side. She and Adam appear to have a friendly relationship, with Adam complimenting her on her large kill count, and Lute joining him in his antics.

Like Adam, she enjoys her status as an angel and dislikes the very idea that angels can make mistakes. Lute especially shows a sadistic side in demeaning Charlie, specifically on how the Exorcists feel about her and other hellborn demons. Her sadism is demonstrated in "The Show Must Go On" when she shouts to "rip Vaggie's c*nt mouth out her ass!", a quote that even Adam finds excessive.

Like all Exorcists, she doesn't care about sinners and resorts to killing them every year in the Extermination, taking pride in how many demons she's killed. Based on her interaction with Charlie, Lute would be happy to target all denizens of Hell, sinner and hellborn alike, during the Exterminations. However, when they discover a deceased Exorcist, Lute is furious at their death and desires retribution, demanding they return to destroy every demon immediately to avenge them. This shows her viciousness, but also her impulsiveness, as despite this incident being solid proof that Exorcists are vulnerable and can be killed by Demons, Lute wants to dive right into Hell without a plan.

She has also shown to have a strong sense of loyalty to Heaven, as shown when despite despising all demons, sinners and hellborns alike, she follows the pardon arranged by Lucifer with Heaven for the Exorcists to leave the hellborn demons alone and only target sinners.

Lute herself is shown to be very loyal to Sera and Adam, her superiors, and she follows their orders without hesitation. She takes the more responsible role, making sure to remind Adam of the seriousness of his duties and to follow Sera's orders of keeping the Extermination a secret from the rest of Heaven.

As Adam dies, an emotionally broken Lute rushes to his side and tearfully screams his name, which shows that she deeply cares about him outside of their professional relationship.

At her core, Lute is uncompromising, refusing to give up her mission and purpose as an Exorcist, even viewing mercy as an unforgivable insult. She was willing to tear off her left arm in a fury to continue the fight against Vaggie. However, Lute is pragmatic enough to know when a fight is lost: After Adam is killed and the army is left at the mercy of Lucifer, Charlie and their allies, Lute took Adam's halo and called for the Exorcists to retreat.

Despite this, Lute's determination in her mission shows her resourcefulness and tenacity, as she proceeds to use any resources at her disposal to keep the status quo of Heaven, further demonstrated by ordering Lilith to take care of Charlie or calling off the deal Lilith was part of.