User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-2208155-20190822142640/@comment-39047410-20190822144415

Yeah he was about to defeat Rias and Kiba, but left when the Hero Faction arrived.

Also about their personalities: Gressil despite being more talkative than Sonneilion, he doesn't find any value in human life and feels no guilt in commiting mass murder. He fights Issei and Akeno, was able to adapt quite well when fighting against Issei and grows stronger with each fight. Its thought that he may be able to develop a resistance to [Penatrate] and he gained a resistance to light (which devils are weak against) He leaves when the Hero Faction arrives. In the 2nd fight, he gets killed by Tobio.

Sonneilion despite being quiet, hates when things don't go as planned. Which is expected for his mental age. He fights Rias and Kiba, he's great against straightforward attackers, but struggles against technique types. However he quickly adapts to Kiba's fighting style after a short time. A weakness is that he has to look at where he wants to compress and there's a less than 1sec delay between his range attacks. He leaves when the Hero Faction arrives. In the 2nd fight, he gets killed by Cao Cao.