Master Class Ch. 2 How a character became a legend

[dregspan]

HI ~ Good day for you ~

I would like to ask how does a player become a legend?
One day I was going to set the character as a hero,
but I don't know why the character has become a legend,
and the weapon I received is also a legendary weapon,
can someone help me answer this question?

Thank you all ~ *   

The Database set : https://imgur.com/a/F8ulmnO

note :
Only characters in the fourth row become legendary !
Others are normal heroes !