I am an old Stargate SG1 fan and someone who has played disgaea and other NIS title the Name Ba'al triggers meNo? It's literally in the first half of the chapter (previous bit)
Some group + maybe a prince has been trying to utilize Solomon's homunculi by removing their affection to Solomon from their power by giving them form (as hypothesized by the old elf in this chapter, the new form is incompatible with the old mana)
Ange was the one who's questioned to be the 'successful one', not this kid.
Also there's several demon lords, named after the demons of ars goetia (this kid should be Baal)