"See that gap in the main circle?" There is such a gap. "That's for you. All you have to do is connect the lines once I'm done writing." Which she is now done with! She's removed the binding because she's pretty sure that it's just a tactical nightmare in this situation. There could be a number of reasons why the Simurgh would put them in a situation where a summoned angel might need to kill Legend. And she actually does know her friend, he will not knock out Legend and go on a marvelous adventure to turn people into furniture, unlike some angels.

"Okay, we're skipping on a thing called a binding because I know my friend and I don't know enough about bindings to make one that isn't terrible. A binding prevents daeva from doing certain things, like making a black hole to destroy the planet, or killing their summoner, so on. But, again, I have known this guy for a while. A little over a century. He is quite trustworthy." Pause. "Dismissing a summon means thinking about dismissing them for about a minute, so if he, against all odds, starts causing trouble, I get you away from him and you think very hard about making him go away. But that shouldn't happen at all." She motions to the circle. "Well, anyway. Circle's all yours."