What kind of sin?
She saved the child, who might end up being killed by that cruel host.
Belan's suffering would only be possible because of the child, Ai. If something happened to Belan, then that should be Ai's doing.
Her only sin was killing the host using Belan's hands. But that host deserved to be killed.
is belan the daughter, so it saved kids then went against krisiri and helped the fire weilder lady who was pregnant but she took out the baby who is now ai ..... and they say greek mythology is a breakneck weird xD this is close, reminds me of athena's creation LOL who is born from zeus's ribcage was it? so dramatic *giggle