Ioladio Wellweger

is a Demon disguising as a Human woman in Wallnack.

Appearance
Ioladio is a humanoid demon with large bulges on her head covering her eyes, two wings, black spots on her chest and waist, and two long, branching arms.

In her human form, Ioladio is a gorgeous woman with short hair and perfect body proportions.

Whenever she turns back to her Demon form, her clothes always tear apart to pieces.

Personality
Ioladio is shown to be mischievous and totally shameless, as she doesn't mind being naked in front of others, although this may be because her species is not used to wearing clothes.

She also cares for her companions as she willingly will do anything to keep them safe.

Wallnack arc
Ioladio was staying at an inn in Wallnack, where Tristan Liones arrives to share a room with her. Ioladio is delighted with her presence, although she downplays it by not wearing her clothes, so Tristan decides to help her even though he can not button her shirt properly. When Isolde bursts in breaking down the door, she dress Ioladio herself. The woman asks Tristan to go to the village festival together, since she wants to talk to him about something in private, revealing that she is aware that he is one of the Four Knights of Apocalypse.

At the festival, Tristan says that he already felt something strange when she called him a prince upon seeing him, suggesting that she came from Camelot. She introduces herself as Ioladio and tells Tristan that this festival used to be held in commemoration of those who died in the attacks that Liones suffered, but Tristan agrees that now it is held to commemorate those who died during the Holy War 16 years ago. Ioladio says how beautiful that tradition is, something that would never be found in her homeland, and that for now they should pray together.

When the magic that was affecting the entire town is momentarily lifted, Ioladio reveals that her Jamming power will continue to prevent all magic detection within Wallnack, so none of his allies can find Tristan. Seeking to answer his earlier doubt, Ioladio denies being Camelot's ally but reveals that she is not human, reverting to her original demon form.

Ioladio suddenly attacks Tristan, with this one dodging and responding with his Ark-enchanted sword. As Ioladio is able to avoid his strikes, Tristan ask her abour her motives to attack him, even if it is because he is a descendant of the Goddess Clan or the son of a traitor from the Demon Clan. Ioladio neglects his words and shoots and elastic adhesive that binds Tristan to the ground, coming then to beat him up using the rebound to harm him more.

Tristan finally breaks her adhesive with his bare hands and lands a good punch at Ioladio to stop her down. Tristan begins to talk about how the demons suffered the same losses as the other races during the Holy War and Ioladio reveals that she was sent by Arthur Pendragon to eliminate the Four Knights to avoid being killed by her own comrades whom Arthur brainwashed.

Tristan asks why she did not tell him sooner, to which Ioladio replies that she is not afraid of dying since she and her companions would be killed by Arthur eventually, but she wanted to at least find out if the Four Knights were strong enough to be a threat against Arthur. Having confirmed this, she asks him to defeat Arthur, though Tristan says that they all need to work together and that his own teammates are skilled enough to take on hers.

Ioladio then looks shocked that Gawain and Lancelot managed to defeat her companions and break the brainwashing spell. Ioladio thanks them for not killing her companions, but Lancelot says that it was only because they were being manipulated and because he intends to get information from her in return. As the two leave, Lancelot tells Ioladio to contact them before leaving town the next day. Seeing them leave, Ioladio thinks that she never imagined that users of such powers existed.

The next day, Tristan introduces Ioladio to the rest of the group stating that she can give them information to get to Camelot. Ioladio apologizes because her magic was responsible for one of them dying, to which Anghalhad says that they will not forgive her if her information about Camelot is not useful. Ioladio affirms that yes, but that to get it they must accompany her to the Demon Realm. When Percival asks what the Demon Realm is, Ioladio is surprised to see him, calling him by his name.

Demon Realm arc
As they all start walking, Percival asks Ioladio if they met before, to which Ioladio is surprised that he does not remember how all the demons appreciated him before. Arriving at a strange archway, Chion accuses her of reaching a dead end. However, Ioladio asks Percival to put his head in the arch, revealing that the entrance is hidden by an illusion. When Chion recriminates why they are going to the Demon Realm when they want to go to Camelot, Ioladio explains that there is an entrance to Camelot in the Demon Realm, being the only one she knows of.

Reaching the end of a long descent, Ioladio admits that she did not consider that all of them could not survive the miasma of the Demon Realm. Although Tristan solves that problem with his Saint Coat, Ioladio says that many demons still hold a grudge against the other races, so she does not blame them if they do not want to move on. However, they all confirm that they want to continue.

After exiting through one of the holes of a large relic in the Demon Realm, they are all suddenly thrown into the void by a current of wind. As they fall, Ioaldio explains that it is a measure to prevent blockades such as corpses and intruders. Returning to her demon form, Ioladio saves Chion from the fall although he is reluctant to take her hand.

Ioladio is quickly taken prisoner along with Lancelot and the Tristan Platoon, with the demons accusing her of bringing humans into the Demon Realm. When one of the demons questions why they sense both light and dark magic in Tristan, Ioladio reveals that he is the son of Meliodas. The demons are then enraged by the presence of a Nephilim, demanding to execute him as an example despite Ioladio saying that he saved her companions. When Ioladio reveals that one of the other captured humans is Percival, the demons are stunned.

After everyone is reunited, Ioladio informs Zeldris that Schwarz sought a fight with Tristan, which she can understand given who Tristan is and how he is seen by the demons, but she doesn't want it to happen since the prince saved her and his companions. Zeldris, however, refuses to intervene, since stopping the fight would not solve anything and that they would have to solve their differences themselves.

Abilities/Equipment
Ioladio proves to be quick enough to dodge Tristan's attacks. She also can spit an adhesive substance that is resistant to fire and magic. Ioladio also has the ability to transform into a human to disguise herself as one to blend in with human villages and towns, although she tears off her clothes every time she resumes her true appearance. In her demon form, she is able to use her wing-like bumps to fly.

Abilities

 * : This power allows Ioladio to nullify any kind of magical detection over a certain area.

Aboru
Aboru is one of her companions she cares about meaning they get along well.