User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-186.2.146.206-20180526235340/@comment-35803348-20180606213823

Nope. Vali have zero interest in Sona. The only girl who can make Vali act like a normal boy is Ice Queen (I already forgot her real name but she in Tobio's team). So if you ask me who will be the strongest candidate for Sona is Issei. She's already open up with Issei and their relationship is close enough to make Saji really jealous of him. If Issei really end up taking Sona into his Harem, I bet that Rias and Akeno will be happy.