WARNING: The following contains spoilers for Chapter #55, “Legacy,” of Boruto: Naruto Next Generations by Masashi Kishimoto, Mikio Ikemoto, Mari Morimoto and Snir Aharon, now available in English from Viz Media.
In Chapter #55 of Boruto, Konoha has been dealt massive blows following Isshiki Ōtsutsuki's defeat. Sasuke has lost his Rinnegan eye, but more importantly, while Naruto's survived, the Nine-Tails demon fox, Kurama, has died.
As they return to the village battered and bruised, while the likes of Shikamaru celebrate the victory, Sumire takes note of the behavior of the Kara traitor, Amado, hinting that he might not be an ally after all.
Amado came over to the Hidden Leaf to expose Jigen and how the villain wanted to use the Karma mark to become Isshiki. He spilled details on the cursed seal that Kawaki and Boruto had, giving Naruto and Sasuke insight into how to beat the alien. Beyond that, he had Koji Kashin fighting and weakening Jigen, which convinced Konoha he was worth the trouble and someone they could feel comfortable offering refuge to.
But as the squad returns, Amado doesn't seem too excited. In fact, he's lost in thought, muttering to himself and weirding out Katasuke. However, in the midst of the post-victory celebrations, no one is really paying close attention. Except for Sumire. When Amado asks about Kawai's well-being, she takes it as a red flag. He hears Kawaki's okay but his relief comes off as fake. He's distracted and clearly plotting something else, and as Sumire watches him, she can tell something is off.
Sumire of all people would know, as she was once a spy who infiltrated the village. She was supposed to use the beast, Nue, tied to her life force, to destroy Konoha on the orders of her dad, a loyalist of the tyrant, Danzo. Instead, Boruto got her to forsake those ways and understand that the ideals of family, love and peace that Konoha stands for. Since then, Sumire's dedicated herself to protecting and even became close with Boruto, but she can still tell when someone's hiding something. Knowing his past, Amado is definitely someone to watch out for, as it's all too possible that he's stuck in his ways and could revert to being a villain.
Sumire would also know that Amado endangered Konoha during his time as Kara's lead scientist, as their war and Kawaki recovery mission took the lives of shinobi like Mugino. So it seems like he might want Kawaki dead once more, going against Naruto's edict, in order to protect the free ninja world. Or worse, he could want the boy to use as his own weapon of mass destruction, seeing as he engineered him, and reshape Kara's vision under his eye. Either way, Boruto has never trusted Amado and given that the boy and Sumire are close, they'll likely investigate this Judas closely.