Yes she is. Naruto is a stupid manga which won't allow the villain to kill side characters. They won't even allow villains to go all out like Aizen
Except Susanoo in a pool of lava won't do much good. What was the point of even throwing them into lava if she wasn't trying to kill them?Kaguya threw a nuke(tenpachii) at Naruto earlier when he was much weaker and survived. She had them high enough to do something about it. Sasuke could have easily put up Susannoo like with Mei.
Sasuke's Susanoo can fly and yes she will wipe them out after absorbing their chakra. Notice how she brought Kakashi and Sakura with them. Why do you think she did that?Except Susanoo in a pool of lava won't do much good. What was the point of even throwing them into lava if she wasn't trying to kill them?
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What happens when all your chakra gets absorbed? You die.No she's trying to absorb their chakra. Haven't you been paying attention?