You mean "Who in HEAVEN is Jesus?" don't you?
JESUS IS GOD. He now is in Heaven.
Jesus said, "I and the Father are One."
"If you have seen Me, you have seen the Father, also."
"Before Abraham was, I AM"
"I AM the Alpha and the Omega, the Beginning and the End."
This is GOD speaking. Jesus is GOD IN THE FLESH.
God made Himself man, and came to earth. He had to become like man to die, so we could have our sins forgiven, and be reconciled back with God (Father, Son, and Holy Spirit)
Jesus is also God's Son, in the way that He separated Himself from the Father to come to earth. He had to be born of a human woman to do that. That is how He is also the SON OF GOD. Now, they (Father and Son) are back together again in Heaven on the Throne of God.
Jesus is our Father in Heaven.