Brother, I don't think he was talking about your height.

I have to grow at least as tall as Issei!

But since you just want to use it to get taller...

perhaps you should use the Grail's power to grow another thirty centimeters.

Yes, a woman, medium height, long, black hair. Seen anyone like that?

Sigh. Everyone isn't as short as you are... what good are these boards to someone of the proper height!?

Like a mean, fat cat… But a very large one - this tall, see? And it walked upon its hind paws!