Who is Jesus? Check out what the Bible says:

Christ [Jesus] is exactly like God, who cannot be seen. He is the first-born Son, superior to all creation. Everything was created by him, everything in heaven and on earth, everything seen and unseen, including all forces and powers, and all rulers and authorities. All things were created by God’s Son, and everything was made for him. God’s Son was before all else, and by him everything is held together... He is the very beginning, the first to be raised from death, so that he would be above all others. God himself was pleased to live fully in his Son. And God was pleased for him to make peace by sacrificing his blood on the cross, so that all beings in heaven and on earth would be brought back to God. (Colossians 1:15-20)

In other words Jesus is God himself, the Creator, the one who controls the whole universe. He became a man and died so that the relationship between us and Him could actually be mended. Like it says, Jesus didn’t just stay dead and He is the first person to come back to life and never die again, because He is God. The name ‘Jesus’ means saviour but some other names Jesus has are: God with us, friend of sinners, light of the world, bread of life, Son of God, Son of man, and there are many, many more.

What does he look like?

It’s more important what he is like because this is what really matters but there is a description of what Jesus in heaven looks like when a follower of Jesus had a vision of heaven:

I turned around to see the voice that was speaking to me. And when I turned I saw seven golden lampstands, and among the lampstands was someone “like a son of man”, dressed in a robe reaching down to his feet and with a golden sash around his chest. His head and hair were white like wool, as white as snow, and his eyes were like blazing fire. His feet were like bronze glowing in a furnace, and his voice was like the sound of rushing waters. In his right hand he held seven stars, and out of his mouth came a sharp double-edged sword. His face was like the sun shining in all its brilliance. When I saw him, I fell at his feet as though dead. Then he placed his right hand on me and said: “Do not be afraid. I am the First and the Last. I am the Living One; I was dead, and behold I am alive for ever and ever! And I hold the keys of death and Hades. [hell] (Revelation 1:12-18)