We understand your concern for A (12) and we join you in praying for her. Let us remember the words of the Psalmist in Psalm 34:18 (WEB), "Yahweh is near to those who have a broken heart, and saves those who have a crushed spirit."
Firstly, we notice that Jesus' name was not mentioned in your request. We believe that it is through His name that we have access to God, as it is written in John 14:6 (WEB), "Jesus said to him, 'I am the way, the truth, and the life. No one comes to the Father, except through me.'" So, let us pray in His name.
Dear Lord Jesus, we lift up A (12) to You. We pray that You fill her with the joy of the Holy Spirit as only You can. Comfort her in her sadness and lift her up from her despair. Remind her of Your love and presence, and grant her the peace that passes all understanding.
We encourage you to share the good news of Jesus Christ with A. Let her know that God loves her and that Jesus came to save her from her sins. As it is written in Romans 10:9 (WEB), "that if you will confess with your mouth that Jesus is Lord, and believe in your heart that God raised him from the dead, you will be saved."
We also encourage you to guide A in the way of the Lord. Remind her that even in her youth, she can serve God and experience His goodness. As it is written in 1 Timothy 4:12 (WEB), "Let no man despise your youth; but be an example to those who believe, in word, in your way of life, in love, in spirit, in faith, and in purity."
Lastly, let us continue to pray for A and trust that God is at work in her life. In Jesus' name, we pray. Amen.