Ava Ire is a 15 year old girl and the protagonist of the story, currently pactedwith the demon Wrathia Bellarmina. 

The name "Ava" can have the meaning bird, desired, and life, all of which seem to relate to Ava's aspirations for herself as shown when making the pact. Michelle Czajkowski has also stated that she liked the name Ava "...because it sounded vaguely like Alice and was hoping to give the feel of a standard young heroine." Her last name "Ire" means "intense anger or wrath" , which is another association with her demon. Ava Ire also has a resemblance to "Lava Fire", but without the first letters.

Ava has a lot of difficulty associating herself with those around her. This mainly has to do with Wrathia scaring away everyone that ever cared about her or everyone she ever cared about. She has a very hard time in crowded areas and tight spaces as well. Despite her social anxiety, however, she shows bravery when doing things she feels passionate about, such as going after Odin after he abducted Maggie during her unconscious state, as well as threatening Wrathia for tricking her.

While Ava is a generally kind character, her kindness is not something that should be taken lightly. Ava can be quite harsh to those who have wronged her or hurt her in the past, including Wrathia and Odin. Even in her rage, however, she can sometimes catch herself in her words when she hurts someone else's feelings, often later claiming she was 'just mad'. Wrathia is an exception, though, as Ava hasn't seemed to feel any remorse for insults towards Wrathia, rather understandably so.