I really suggest not to cheat in social links in this game, you will break the game if you level up some of the people not legit way, you have enough data to level up the important people, if you playing royal, just make sure you level up akitchi to 8, maruki to 9 and kasumi to 5 before November.
But if you mean the knowledge and other stats you can cheat in them no problem.
They are not hard.