A period of increasing trouble and decline began with the reign of Commodus. Commodus' assassination in 192 triggered the Year of the Five Emperors. There was an ongoing quarrel between these emperors regarding who was greatest among them.
To prevent further quarrels, a pandit came up with an idea. These 5 emperors were given a chance to fight. A fight of words and not of swords. Each can express their worth through their final words. And based on that, the greatest would be chosen by Pandit and declared so in public. All felt this was a nice idea and agreed with the pandit's suggestion.
The final words were the following:
Hey pandit, I am not much spicy; also gentle in temper. You will for sure like me.
Emperor 2 :
Hey pandit, I am not very brilliant and look somewhat dark. Don't you like the the fact that I still made it till this point?
Emperor 3 :
Hey pandit, do you know that a guy with the same name as mine is famous for guarding a museum for about 20 years. I can guard this empire till my last breath without any problems.
Emperor 4 :
Hey pandit. I am the central component of pyrimidines. Does that sound nonsensical?
Emperor 5 :
Hey pandit. I can tell how old you are. I can even tell more about you. Should I reveal that?
Yes! That was it. And the pandit selected the most worthy emperor by evaluating these last words. How did he do that?
Can you unfold that mystery?!
After all, who was the greatest among them?
You may need to first solve for the 'I's that each emperor talks about.