I DO NOT PERCY JACKSON, THE KANE CHRONICLES OR HARRY POTTER!
She was watching him slowly lose his humanity. It pained him. It pained her. It would pain everyone. Was this really he hero willing to die for any one of his friends? He didn't look like a hero. He looked like a beggar, with deep grey rings around his life less dull eyes. His hair had many streaks of grey and white mingled in with the once beautiful Tartarus-black hair.
She could see him becoming an exact replica of the thing she stood against. Everything that made him different was evaporating; floating away along with every emotion besides blind fury and melancholy.
She knew that she had to help him. If she didn't then all would be lost. And she would be alone. Alone. For ever. For eternity and infinity are cruel: they torture you by drawing by making every emotion and loss immortal.
Immortality is the curse that everyone desires but nobody loves. When you don't have it you do everything to get it. When you have it you long for mortality. The power to die. To know someone mourns over you is lost in immortality. Mortals understand emotions because they know fear. Immortals are void of most emotions as they know no fear – they may exist forever, but they never really live at all. Death may be clouded in despair, but it is still a blessing. For without death you would not know fear. And without fear you would not understand happiness. And if you don't understand happiness, you cannot feel happiness. Like loneliness, immortality eats away on your soul until you are just a never decomposing corpse. Like a puppet, your corpse moves around fulfilling selfish desires that do not bring you happiness. They give a simulation of joy, but not true happiness. True happiness is reserved for mortals. For only those who know true fear know true happiness.
Artemis wanted to experience true happiness. She knew that it was near impossible but she hoped Perseus could help. However, first she needed to help him. She knew only one place and only one immortal that could help her. The school and Hecate.
Hecate was the first hurdle that needed to be over-come. She needed to bless Perseus with the skills of a true wizard. With his amount of raw strength, a very powerful wizard. He already carried the blessing of the powers of an Egyptian magician so it should not be too hard.
Once he had the skills he would go the school and teach (hopefully, however he would learn to). There he would he would receive his present again – his kindness. His happiness. His soul.