[Stella won't answer him for a moment - instead, she inspects the springs, looking as if she's in thought about something. Is it deep enough? Wide enough? She glances at Asch - Would he be okay?

After she decides that this is good enough, though certainly not like the traditional lakes, she looks back at him with a raised eyebrow. Now, how to do this without Asch wondering what in the world she's thinking.]

I'd like to issue a challenge. [She gestures to the water.] Dive in and swim as fast as you can. And above all... Do not let me catch you. I want to see how fast of a swimmer you are.