The Invincible Shield is a disposable item, which will be destroyed once its durability reaches zero. Furthermore, it has to be manually activated, and I'm not sure how long it can remain activated for.
Just from the properties alone, the Invincible Golden Body seems to be more useful than the Invincible Shield.
But for her, the most fitting should be the shield, as she lacks self-defense abilities right now.
Maybe, she could wait until after her physique has improved, then she can somehow trick...cough, borrow the Invincible Gold Body Pearl Brooch!
So, she nodded her head contentedly, "Er Ha, I've decided, I want the Invincible Circle Shield!"
Er Ha looked at Su Tang in distress, "Are you sure? Don't you want to think about it further? Once confirmed, it can't be changed..."
Without any hesitation, Su Tang replied, "Yes, I'm sure! This is it!"
Reluctantly, Er Ha reached out its paw and tapped on the screen in front of her, just as if he was touching a real object.