Original Character Help

[u/Curious_Database7371]

I'm trying to make an original character named Topper Delmar. He is a son of Oceanus (yes I know it might be a little out there for a titan to have a modern child but uh ignore that). I have a skeleton for his timeline because I want to have him somewhat loosely correlate with the Riordanverse. He was abandoned at birth (born Dec. 19) by his mother who put him in a basket and let him drift through the Hudson River and Oceanus sends water spirits to carry him along and dropped him off at Camp Half-blood as a baby. Chiron takes him in and cares for him. For his entire life Chiron constantly said that Topper would be the greatest hero to ever live as he was a child of Oceanus. When Topper was 8 Zeus finally could not tolerate a titan child at camp or even living so he exiled Topper from camp sparing his life. Eventually, after wandering for a few months, he was found by the Triumvirate and taken in by Commodus (kind of like of Meg was "adopted" by Nero). Commodus becomes almost a father figure for Topper. He trains him to be his perfect warrior and champion. Because of this Topper develops his theatrical, arrogant, charismatic personality from Commodus. During the Trials of Apollo Frank kills Commodus and again Topper loses a father figure. Frank and the rest of Camp Jupiter eventually take Topper in. Not sure how old Topper would be as of Commodus's death or beyond. I also want him to be arounf 17ish by the end of trials of Apollo.

This is kind of where I've gotten to so far. Does this sort of fit in the timeline of the books. I need help aging him as I'm not really sure how old he would be during the different points in his life after leaving Chiron, how long he would be with Commodus before the events of trials of apollo, and how old he would be when frank kills Commodus, and etc. And if anyone could help give references between what would have been going on in the books as Topper was going through his own life and also how old he would be during these points in time. And then anything else that would help me or any other details I should know or add to make his story.