[quote=@XxFellsingxX]
I'll go with useful secret. I can't really see Kendra having done something that would make Paimon owe them a debt xP
[/quote]

In that case, you've had a vision about Paimon in the past. It showed you that the key to defeating him or at the very least turning his gaze away from Earth for a time is by harming his standing in Hell and building up the status of another demon. If he isn't outright replaced as the King of the West by this rival, Paimon would turn his full attention to infernal politics, leaving his worldly servants to their own devices.