Persona by Mariner Software is described as 'Persona is a character creation and organization app for writers. What makes the app unique is its sorting system: the user can match each character with an archetype in order to compare multiple characters at once to see how they might interact' and is a Novel Authoring Tool in the News & Books category. There are five alternatives to Persona by Mariner Software for Android, iPhone, iPad, Mac and Android Tablet. The best alternative is Story Planner for Writers. It's not free, so if you're looking for a free alternative, you could try Character Story Planner 2 or Character Story Planner. Other great apps like Persona by Mariner Software are Character Notes (Free) and Writer Assistant (Freemium).
Character Notes is an excellent tool for developing characters for novels and stories. There are five different areas of traits to build on: physical, personality, history, relationships, and character development.