Ian could feel hundreds of thousands of presences trying to lock in his Ki. However, they couldn't do so. Why? Simply, because what he possessed wasn't normal Divine Ki anymore. It was a kind of energy even higher than his Nether Divine Ki and True Paths Devil Ki. Angelic Ki, if Ian wants to, no one can sense his existence anymore, whether it is Suelo or the Grand Devil.
How terrifying is the Grand Devil? She stood high above the Devils. Even Adam, whose strength was both terrifying and a mystery, was far below her. Although Ian has only a few interactions with the Grand Devil... Those times were the few times that he felt he could be snuffed out like a flicker of flame in a candle. Absolutely helpless, with no resistance at all. That's how the feeling of danger Grand Devil gave him, the mother of all Devils.
