In the end, Seraphine decided to follow Eric and agreed to have Clement guide them around the tunnels.
At first, she was torn between not trusting him and fearing for his life. If he did try to betray them, he would be joining Clifford at the doorstep of death. She really didn't want any more bloodbath, and she was still concerned for her fellow orphan despite everything. But fortunately, none of what she was afraid of had happened.
Clement neither did any backstabbing nor got beheaded by Eric - he did as he promised.
"Freedommm...!!!"
As soon as they got out of the underground and arrived in what seemed to be a forest, Seraphine could not help but be so relieved that she ended up shouting that out.