User blog comment:MrSolomon/Solomon's Tale; The Seekers of Truth. Chapter 3/@comment-7475345-20140428133113/@comment-10534118-20140428200956

Think of it this way: He's being observed by Eden just like the other Seekers, his superiors can track and locate him, he's aware of what happened in Remina now so Ilias may want to keep his mouth shut if he decides to tell people, and he's seen the power of the Next Dolls in action and knows of how vast Promestein's chimera army is, and has been informed of the 'White Rabbit.' Something that Luka, someone far more powerful by comparison, would even be cautious about.

If he wanted to escape now, he would end up hunted down and he wouldn't wanna risk bringing a chimera horde in a civilized place just because he wanted out. And even if he had somewhere to go and hide afterwards, he hasn't fully sacrificed the people he cares about to be willing to put them in danger. Unlike Lucia, who joined mostly out of not having anywhere else to go after the cruel things Lily had done to her and was willing to leave the Seekers after her defeat, Shirome, who has already comitted some major crimes, was deemed insane, and was declared a grave criminal and not willing to leave, or Laplace, who was built from scratch and is bound to the Drain Lab.

Now think of when he was recruited. He at first agreed to preserve his life, afterwards he views the Seekers as a way to fufill his quest for knowledge so his loyalty is shown there. Part of Solomon's character is the moral confusion between his ambition and the results of it. He knows of Promestein's plans and the human lives at risk, he however does not feel he's capable of escaping or making a difference should he decide to help humanity. However he does know that Ilias is pulling the strings here so he believes his Master does not fully wish to destroy humanity. He's been training and studying at the lab for two years, he was given fire and wishes to use it to achieve greater things.