As a Sailor Senshi, Ami has been depicted in bondage as Sailormercury far more often than in her civilian form. Her shyness makes it difficult to approach her on a casual level, but she will allow those she's close with to tie her up. Even if she isn't physically strong, her sharp mind allows her to think of and find various ways to escape, so it's best to keep a close eye on her at all times. Use a lot of tape and mitten her hands. If she's tied up as Sailormercury, focus on exposing her thighs and hips. If she's tied up in her civilian form, base the tie on her outfit. In any case, use a gag that emphasizes her eyes and hair. If she can overcome her shyness about it, she may eventually admit that she's coming to enjoy bondage.