Eida is one of Boruto: Naruto Next Generations' most intriguing characters. She blurs the distinction between good and evil. Yes, Eida can be considered a villain, but not in the usual way. She doesn’t want to destroy the world or rule it, but her powers and choices make her a major threat. With her ability to make people infatuated with her, she walks a fine line between friend and foe.
Eida is a cyborg created by Amado, the former Kara scientist. She seems like just another typical teenage girl, but she’s far from ordinary. Her powers make her stand out right away. She can make almost anyone fall in love with her just by being near them. The only people who are impervious to this ability are blood relatives and Otsutsukis. This makes it hard for people to attack her.
She also has a second ability called Senrigan. It lets her see everything that’s happening in the world right now and even things that happened in the past. With these two powers, she’s basically untouchable. It was later revealed that her abilities of infatuation, senrigan, and Daemon’s (her brother’s) reflection were all obtained from Shibai Otsutsuki. Her taijutsu abilities are also nothing to scoff at. Amado clearly said at a point that her abilities as a fighter exceed Jigen's, an antagonist in Boruto.

Eida doesn’t kill people or destroy villages, but that doesn’t mean she’s harmless. Her charm ability takes away people’s free will. Once someone falls under her spell, they will do anything to please her, even if it goes against their true feelings.
It isn’t the number of people she has killed that causes fear in her. It is the ease with which she can sway an entire nation without so much as lifting a finger. That’s why she’s such a threat. People are afraid of what they don’t understand or can’t fight. Even characters like Shikamaru and Amado acknowledge that she’s nearly impossible to control, which means she could be both a potential threat and a wild card in Boruto.
These powers alone would make her a force to be reckoned with, but her motives and goals are even more confusing. She isn’t interested in taking over the world or destroying villages like many classic villains in Boruto. Instead, Eida simply wants something that sounds much more human—love. That’s all. But because of her charm ability, finding real love is almost impossible. Everyone she meets is affected by her power, except for a few like Kawaki and Boruto.

Her main goal in Boruto is to win Kawaki’s heart. Everything she does, from teaming up with Code to moving into Konoha, is part of that plan. She isn’t trying to hurt people deliberately, but her actions still cause big problems, like the time she made everyone think Kawaki was Naruto’s son.
Eida first appears with Code, another powerful villain tied to the Kara group, who wants to carry out Isshiki’s will. She agrees to help him, but it’s clear she has her own goals. She would rather not help Code destroy Konoha or get revenge. Instead, she uses the situation to move closer to someone she’s truly interested in—Kawaki. Her love for him is so intense that she threatened to destroy Code if he harmed Kawaki.
Later, Eida actually switches sides and agrees to live in Konoha under close watch. She works with the Hidden Leaf rather than against it, and her presence becomes more of a question mark than a direct threat. Even though she’s living in Konoha, most people don’t trust her. And honestly, they have good reason.

Eida's Role in Boruto?
In simple terms, yes—Eida is a villain, but not in the same way as people like Orochimaru or Madara. She doesn’t hurt people for fun or chase power. But she still takes away people’s freedom, hides the truth, and uses others to get what she wants. Even if her goal is love, the way she goes about it causes harm. At best, she’s a morally grey character. At worst, she’s a silent threat that could cause even bigger problems down the line.
Eida is one of Boruto's most unpredictable characters. She doesn’t fight like past villains, but her powers and choices shake the story just as much. Whether she’s a villain, anti-hero, or something in between, one thing is clear—she changes everything around her. Even if she’s not out to destroy the world, the danger lies in how easily she could do it without even trying. Especially if it is for Kawaki.