Thread:Astarothfan/@comment-27083298-20170611064602/@comment-29963364-20170614065218

@B214

It's true. A Clan/Family/House (I'm gonna say "Clan") can hold a Noble rank, but only the Leader of the Clan (either Lord or Lady) actually gets the rank, and all the privileges that come with it. If the Leader gets married, then his/her spouse gets the gender-equivalent role (if a woman marries a Duke, she becomes a Duchess).

The Leader's children don't get the rank, but they are "princes/princesses" of the Clan.

So the only way for a Devil to earn a Noble Rank is to either...

1.) Earn in through Promotion (like Tannin, Rudiger and Issei have).

2.) Be born into the Clan and inherit it (as Rias, Sona and Agares will).

3.) Marry the current Leader of a Clan, or the heir/heiress (as Issei will, since he'll marry Rias).