Answer:
Well, while in the end, it is your decision to make, I would typically go with Denki.
Step-by-step explanation:
While Denki is considered the "dum.b one" he can actually be quite intelligent which people don't give him credit for, no matter what his heart is also in the right place. He tries to do everything for his friends that he can and he's always trying to make everyone happy which is good. He takes care. of those who are around him and comforts them in time of need. He has the good characteristics and personality of being a fantastic friend and also he is someone who would not only risk his life for his friends but also for someone in need. This is my take on it.