Percy has never mentioned to ever cry in front of anyone canonically. No matter how hard it got. Ever thought when he first cried? So I came up with this headcannon.
The first time he cries was his wedding. He takes one looks at Annabeth after kissing her. As soon as the priest says "i pronouce you two husband and wife" he just starts crying. His tears just don't stop and keep crying. And is like "i can't believe we made it." And that is how the whole camp sees the great fearless percy jackson cry for the first time. Sobbing at his wedding. Not being able to believe he uad something permanent in his life. Annabeth makes countless tries to make him stop only to break down herself. So the pair just stand there, forehead pressed together, tearing out of happiness.
Not breaking down over a death, a quest, a war, a fall into tartarus, almost dying but by the fact that something was permanent that 𝘮𝘢𝘥𝘦 𝘪𝘵.
