You'll know she uses it if a green aura surrounds you and your teammates, and it is very helpful... it can mean the difference between life and death against some enemies...
"Therefore each of you must put off falsehood and speak truthfully to his neighbor, for we are all members of one body. 'In your anger do not sin': Do not let the sun go down while you are still angry, and do not give the devil a foothold." Ephesians 4:25-27 (NIV)
"This is what the Sovereign Lord, the Holy One of Israel, says:
'In repentance and rest is your salvation,
in quietness and trust is your strength,
but you would have none of it.'" Isaiah 30:15 (NIV)