Kevin -- I hope I am understanding this question. Your sister has passed on and you are trying to connect with her. If I have misunderstood, please forgive me.
First, let me say I am very sorry for your lost. I recently lost my brother and so I know your sorrow. But if you are trying to establish a relationship with her, don't. She, like my brother is dead. You have to let go, she cannot hear you or see you.
I don't know your views on God, but I can tell you from God's point of view, he prohibits any practice with the dead. King David lost his son. People were asking him why he was not fasting. The King responded by saying "While the child was alive, I fasted and wept. I thought " who knows? Maybe God will be gracious to me and let the child live. But now that he is dead, why should I fast? Can I bring him back again? I will go to him, but he will not return to me". 2 Samuel 12:21-22. He accepted that his son had passed away.
King David, is the most known king, both in the Bible and history. I figured I would mention this just in case you do not know who he is.
God can sustain you. Look to Him. He gave His Son Jesus to die for your sins and sorrows. He can give you inner peace. But trying to talk to your sister can bring dangerous results.
I just wanted to express my sympathy on the loss of your brother. God bless you.
LindaRuth -- Thank you for your expression of sympathy.
The Bible does hold out the hope of the resurrection. A?na?sta?sis, the Greek word translated “resurrection,” literally means “a standing up again” and it refers to a rising up from death. The fuller expression “resurrection of (from) the dead” is used repeatedly in the Scriptures. (Matt. 22:31; Acts 4:2; 1 Cor. 15:12) The Hebrew is techi?yath? ham?me?thim?, which means “revival of the dead.” (Matt. 22:23, ftn, NW Reference edition) Resurrection involves a reactivating of the life pattern of the individual, which life pattern God has retained in his memory. According to God’s will for the individual, the person is restored in either a human or a spirit body and yet retains his personal identity, having the same personality and memories as when he died. The provision for resurrection of the dead is a magnificent expression of Jehovah’s undeserved kindness; it displays his wisdom and power and is a means by which his original purpose regarding the earth will be carried out.