A description of most characters featured in various mythology series by Rick Riordan. Overview List indicator(s) A dark grey cell indicates that the character was not in the property or that the character's presence in the property has yet to be announced. "Main" indicates a character had a starring role in the property. "Supporting" indicates the character appeared in two or more times within the property. "Guest" indicates the character appeared once in the property. "Mentioned" indicates the character was not in the property but was talked about {| class="wikitable" style="text-align:center; width:99%;" |- ! rowspan="4" style="width:15%;"| Character ! colspan="17" style="text-align:center;"| The Camp Half-Blood Chronicles ! rowspan="2" colspan="3" style="text-align:center;"| The Kane Chronicles ! rowspan="2" colspan="3" style="text-align:center;"| Demigods and Magicians ! rowspan="2" colspan="4" style="text-align:center;"| Magnus Chase and the Gods of Asgard |- ! colspan="6" style="text-align:center;"| Percy Jackson & the Olympians ! colspan="6" style="text-align:center;"| The Heroes of Olympus ! colspan="5" style="text-align:center;"| The Trials of Apollo |- ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! |- ! style="background:ivory;"| ! style="background:ivory;"| ! style="background:ivory;"| ! style="background:ivory;"| ! colspan="2" style="background:ivory;"| ! style="background:ivory;"| ! style="background:ivory;"| ! colspan="2" style="background:ivory;"| ! style="background:ivory;"| ! style="background:ivory;"| ! style="background:ivory;"| ! style="background:ivory;"| ! style="background:ivory;"| ! style="background:ivory;"| ! style="background:ivory;"| ! style="background:ivory;"| ! style="background:ivory;"| ! style="background:ivory;"| ! style="background:ivory;"| ! style="background:ivory;"| ! colspan="2" style="background:ivory;"| ! style="background:ivory;"| ! style="background:ivory;"| ! style="background:ivory;"| |- ! colspan="28" style="background-color:#ccccff;" | Main characters |- ! style="text-align:center;" | Perseus "Percy" Jackson | colspan="6" | rowspan="2" | colspan="5" | | colspan="3" | | colspan="3" | | | | | | | |- ! style="text-align:center;" | Grover Underwood | colspan="6" | | | | colspan="2" | | | colspan="3" | colspan="10" |- ! style="text-align:center;" | Annabeth Chase | colspan="6" | | colspan="5" | colspan="3" | | colspan="3" | | colspan="3" | colspan="3" | |- ! style="text-align:center;" | Luke Castellan | colspan="6" | | | colspan="5" | colspan="14" |- ! style="text-align:center;" | Thalia Grace | | colspan="1" | | | colspan="3" | | | | | | | | | colspan="2" | colspan="11" |- ! style="text-align:center;" | Tyson | | | | colspan="3" | rowspan="2" | | | | | | colspan="3" | | | colspan="10" |- ! style="text-align:center;" | Nico di Angelo | colspan="2" | colspan="4" | colspan="6" | | | | | colspan="10" |- ! style="text-align:center;" | Rachel Elizabeth Dare | colspan="2" | colspan="2" | |