User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-16281343-20150310114346/@comment-73.178.133.185-20150311163504

From what little info we have, it indeed appears to be that they have special abilities with such elemental affnities. As to why this hasn't really been seen, Ishibumi only recently developed the Five Families and thus these features weren't in Akeno's and Tsubaki's character plans/designs.

In universe, we don't really see Tsubaki using magic/demonic powers thus her elemental affinity doesn't really show up. She was also isolated during her youth due to her SG running wild (summoning 'demons' through mirrors) and thus would not have received training on using such abilities. If Akeno wasn't blessed with her clan's affinity for the fire element, that could be because she did not receive their Sacred Beast's blessing due to her nature of beining half-Fallen Angel (or it could simply be that her father's blood was stronger). On the other hand, there is nothing stating that she doesn't. Due to the fact that she was daughter of Baraqiel, there's a greater focus her thunder and (holy) lightning abilities. However, the only know ability that came from her mother (trained not inherited) was joreijustu/exorcist arts. They are only mentioned and could have a unseen fire aspect. Futhermore, she does possess demonic powers of fire/flames (which 'evolved' into an 'enryuu' attack much like the her (holy) lightning became a 'raikouryuu'). It could be that when she became a devil, she chose to exercise both her natural 'power of thunder' from her father and 'power of fire' from her Himejima blood through her demonic powers while sealing off her angel/fallen angel-exclusive 'power of light' in resentment of her father as depicted in the novels.

All other members are either minor or new characters whose abilities haven't been really explored yet.