Helios "Pegasus"
Pegasus arrives in the SuperS season and enters Chibi-Usa's dreams. He does this because her dreams are beautiful and it's a good place to hide from the monsters that are after him. While inside her dreams he helps Chibi-Usa out with life's problems. When Pegasus first met Chibi-Usa he didn't trust her because he wasn't sure if she would give away his hiding place. As time went on he gave Chibi-Usa a Crystal Challice so that she could talk to him.
Later in the season he tells her of his big secret, and that he is really Helios from Erusion. He lived there for a very long time when there was peace and harmony. Suddenly the Dead Moon Circus came and covered his land in darkness. Helios fled from his planet, and changed to Pegasus when he saw Chibi-Usa's pure dream light.
Throughout the SuperS series we can DEFINITELY tell that there was something going on between the two. One time Chibi-Usa wanted to see him, but couldn't because she wasn't able to cross over and see him. She did it anyway, and stayed with him for awhile. He also gave her a kiss when he was in his Helios form. She saw his face, and instantly fell in love. He told her that he had to go back to Erusion, and disappeared. This crushed Chibi-Usa, but she understood his situation.