CONFUSION ABOUT LAST CHAPTER
seems like people were a little confused about last chapter.
Ok let's go.
Firstly if you have read the note at the end of last chapter I clearly said that Basara is a cousin to them.
([1]: Before anyone screams in the comments. I just need to remind you that the Japanese use the same title for cousins and siblings. So an older brother would be Onii-san and an Older cousin would still be Onii-san.)
This is what I wrote.
anyway
Basara's father is Jin. One of his mother is Sapphire.
Sapphire is Zeoticus big sister.
Zeoticus has three four blood related Children (Sirzechs, Rias, Mio and Maria) and one step daughter (Lucia) but not all of them have the same mother.
Sirzechs and Rias has the same mother as in Canon in DxD.
Mio has her own mother who is a devil.
Maria and Lucia have the same mother as in Canon in Shinmai.
As for Basara he is blood related to all the members of Gremory family through his mother (expect Lucia)
Hope it helped.
For those who don't know ( it wasn't addressed in the anime)
In Shinmai Basara is indeed the Cousin of Mio and Maria