The ice continued to grow, up and around his legs, then his hips, his middle...
"Use all your energy to force it back. Push yourself up and out. Break free, as if fighting off chains!" she instructed him. She wanted to see if he had any energy similar to her own. If Ichigo was there, they'd be finding out who else had decent spiritual pressure in no time.
"The energy around you and inside you is like... electric. It builds up, it is fast, it is strong. But it is hard to control. Use your will to control it, use your will to bind and force it!" she shouted. She was ready to break him free if needed, but she wanted to wait and see.