The angels were holy ministers to men according to the Holy Bible.
In the book of Matthew/Luke the LORD our god, sent Angel Gabriel
to tell of the good news of the birth of Jesus Christ .
It was the angels.
his disciples, before Jesus ascended into heaven
There is no extra-biblical evidence that Jesus ascended to heaven.
Jesus Christ ascended to heaven from Jerusalem after he came back from the dead.
white dove
He sent the Holy Ghost to be with us.
because he finished his mission on earth
Once
god
The question is not clear, who appeared when? It was the Angels at the tomb and Moses and Elijah on the mountain.
Answer: Judas was not present since he had committed suicide.
He didn't and won't. He ascended into Heaven.