@robloxoof
I dont think he thinks of her as a tool, at least, not in this manga at least.
I know he thinks of her as a tool in the anime and LN, but things are different here since Suzune accepted his friendship.
I was thinking that Ayano wants a normal life, and part of having a normal life is having friends.
So while he has Suzune as a friend, he doesnt really have genuine concern, its just part of the normal life he wanted