Kelan then came to his senses and he hurriedly asked him before they joined the others back : "Wait, I wanted to ask you this before but I completely forgot… Why is the atmosphere here so tense, is it because of this Atlas ?"
Caleb put an arm around his shoulders and he told him as they joined the others : "When Atlas regains consciousness, we don't know if he'll be truly conscious or if he'll be under the influence of the black particles.
Also, even though he apparently chose to protect Lena at all costs, and chose not to serve the Emperor of the Titans anymore, that doesn't necessarily mean he'll be on our side, we have to be on guard with him because as you've seen it yourself, this Titan is extremely powerful."
Kelan simply nodded, he knew that if Caleb really felt any danger he would immediately send him to the prison dimension, but since he was letting him stay with him, it meant that at least they hadn't had any visions yet.