Burtek is a Twi'Lek. He is a very competent Jedi Knight. He will be training most new arrivals at the Jedi Academy.
Atropos is a Mon Calamari. He is a very competent Jedi Knight. He is an archivist at the Jedi temple, he is helping Luke decipher the Jedi Holocron. He has been forced to take on students as there are not enough Jedi to go around.