question

[Giba]

is getting heroes is pure luck or there is somehow that you can get hero you want

[Meo]

If you are talking about opening chest it's completely random.

The only guarantee way to get the hero you want is to buy it in shop

[Giba]

if you ever see him in shop :) i really need cepai to complete blue dragon dungeon and there is only 3 days left :(

[Knightified]

Yeah you've just gotta pray to RNG gods to get it from a chest or get it in the shop.