User blog comment:B214/Volume 23 discussion blog/@comment-201.215.165.7-20170723034018/@comment-10330822-20170726171841

I'd imagine it depends on the mythology. In Norse mythology, the Odin is always considered to get older over time, however, because of their golden fruits, the gods of the Norse age at a much slower rate than mortals. So the fact Odin is old is a testiment to his ancient age. He's supposed to be much older than the younger gods, like Loki and Thor.

So, that's the case for the Norse. As for the Hindu, I don't think Indra is that old, or at the very least, that he has lost any strength. The Triumvirate are the oldest Hindu gods, because they are considered to be the creation and balance of the world. This means that currently Shiva is the eldest among the Hindu gods, and he has the appearance of a young boy Issei's age, so I don't really think the Hindi gods age much.