[There's a sad sigh, but he doesn't elaborate. Toriel and Frisk...maybe they're both better off not knowing he's had to kill. Not knowing that while he doesn't believe in it, doesn't believe that's how the world works as a whole, he's had to adhere to it to survive and to save the world from destruction.]
...I'm...I'm so glad you were able to see the surface, after all. What happened to all of you is cruel, and I'm sorry for the behavior of my kind, even if I'm not from your world.
voice
[There's a sad sigh, but he doesn't elaborate. Toriel and Frisk...maybe they're both better off not knowing he's had to kill. Not knowing that while he doesn't believe in it, doesn't believe that's how the world works as a whole, he's had to adhere to it to survive and to save the world from destruction.]
...I'm...I'm so glad you were able to see the surface, after all. What happened to all of you is cruel, and I'm sorry for the behavior of my kind, even if I'm not from your world.