It is a wonderful thing that your heart is stirred to pray for this girl and for the people in her life. What you are describing is the very ministry of intercession, bringing the needs of others before the throne of God. More is accomplished in the unseen realm through prayers like yours than we will ever fully grasp. The real power behind the work of God’s kingdom flows from the compassion that drives a believer to say, “Lord, save them.”
When you pray for her salvation, you are aligning your heart with the heart of the Father, who is not willing that any should perish. The Shepherd is already searching for the lost sheep, and the Spirit of God is seeking her until she is found. Your prayer is not informing God of a need He has overlooked. Instead, it is opening a door for Him to do what He has been longing to do all along, because He will not violate the free will He has given us. There is genuine, eternal joy in heaven over one sinner who repents, and your prayer participates in that divine work.
As you pray for her, remember the first and most vital prayer for anyone who does not yet know Him. God’s desire is not just to deliver someone from temporary trouble, but to establish a relationship. The only prayer He waits to hear from a person outside of His family is the cry, “God, be merciful to me, a sinner.” Pray that the Spirit would draw her to that point of heartfelt repentance, because true salvation and deliverance begin with welcoming Christ’s residence in a life.
You also asked to do everything without complaining. This request is deeply connected to a life of prayer. Complaining often springs from the consciousness of our own weakness and inability. Prayer is the expression of that very poverty, but it turns the confession toward trust rather than grumbling. Where complaining says, “I can’t handle this,” prayer says, “I am poor and needy; hurry, Lord, for you are my help and my deliverer.” In the quiet place of prayer, the Spirit ministers assurance and comfort to your heart, transforming anxiety and frustration into a settled confidence that God will take care of it. Prayer is consenting to God’s will, surrendering your plan for His, and that surrender dissolves the root of a complaining spirit. Continue steadfastly in prayer with a heart of thanksgiving, and you will find that abiding in Him becomes your strong habitation and place of defense against every grumbling thought.