Name Change

You need to do 3 things:

1. Transition to the Tremorsense pick
2. Transition to the sbName field
3. Append some text to the field

So:

hero.child[xTremorsen].field[sbName].text &= " (your additional text)"

That starts at the hero, transitions to the Tremorsense pick, moves on from there to the field on that pick, and then adds the text to what's already there.