The âGood versus Evilâ-conflict isnât as cut-and-dry as âthere are good people and evil people, and good things and evil things to do, and if you do good things it pisses off evil people and if you do evil things it pisses off good peopleâ.
Situations like these are where writing can really shine. Give them the opportunity to argue more standpoints than just âyouâre either for or against slaveryâ and âyouâre either for or against hurting childrenâ. Use the opportunity to flesh your characters out. Your NPCs may well disagree with what your PC wants to do - vehemently, even - and perhaps resent them for doing it and bring it up again later. Perhaps an âevilâ NPC will make snide comments about the PCâs hero complex, trying to save every mewling brat they find along the roadside. Perhaps a âgoodâ NPC will intercede, and temporarily leave the party to help the child on their own, and be all âI canât believe how callous you can be sometimesâ when they return. Perhaps the âevilâ PC will be pissed at them for that insubordination (Lawful evil), or imposement of the NPCâs will onto them (Chaotic). Perhaps they will be making snide comments at eachother for the remainder of the adventure.
Iâm not a big fan of the entire âdisagreement/conflict equals parting ways foreverâ thing in general. Itâs actually possible to like and respect people for having different opinion and temperaments from oneâs own. These folks are tramping around together for a reason, right? I mean, as people, they could be anywhere, doing anything they want, but theyâre there, in this party. Somethingâs already motivating them to be there. Psychologically, they may already be attached to these people, and well see cause to try to argue and change the other group membersâ minds rather than just leaving. Perhaps your âgoodâ NPC will feel driven to try to change the PCâs mind. Perhaps your âgoodâ NPC can be group pressured into going against their morals, drawing some very uncomfortable parallels into real life that many people will recognize having experienced themselves. Perhaps repeat occurrences of this can completely undermine their confidence in their moral values and eventually corrupt them into no longer being âgood-alignedâ.
I rather expect if you consistently act against somebodyâs deeply-held convictions of ârightâ and âwrongâ, theyâll, given the opportunity, eventually turn on you, though. No doubt if the PC does that a lot, that NPC is going to grow to hate them.
As with Kamalâs examples, there are plenty of arguments for or against helping children in need - from âevilâ and âgoodâ viewpoints alike. Thatâs where charisma/intimidation/diplomacy checks come in, for either NPC, as well as outright lying to your companions. Perhaps an âevilâ PC will send the âgoodâ NPC away, to check for other prisoners while the PC âhelpsâ the child. Perhaps your âgoodâ NPC will believe them, if they havenât been given reason not to, so far.
Perhaps theyâll find out later, and be completely appalled at what theyâve unwittingly been a part of.
If youâve got an âevilâ and a âgoodâ NPC disagreeing and the player needs to make a choice, Iâd laugh a lot if you can manage to create an option where the player pisses both of them off equally and actually winds up making them get along better by presenting a low-grade mutual enemy in a âShow, Donât Tellâ case of Not So Different.