1x38 - Beelzebub

Oga attempts to explain the whole situation to Aoi, but him and Furuichi get stuck on remember BabyBeel's name. Not long after, a demon maid servent who looks similar to Hilda named Yolda appears, and expresses her unhappiness on the situation. Soon another 2 demon maid servents appear along with a young boy who is introduced by the maids as Lord En, BabyBeel's older brother, who has come due to BabyBeel taking too long to destroy humanity. Aoi then understands everyone that's going on. BabyBeel and Lord En do not have the best relationship, where BabyBeel is constantly ignoring the attention-seeking Lord En, making him upset. Lord En is also seen to love anything to do with games.