Typical useless, bullshit, GDNet knee jerk post.
This is the epitome of why this forum blows. If you're not going to leave a thread better off than how you found it, why bother posting?
Zenonia 5 is an simple android top down action RPG. It's 90% design and 10% programming. It's not some big, insurmountable goal.
For android you'll want Java (read a book and learn it all first, if you jump ahead, you'll spend your entire year stuck on trivial things) + libGDX (don't touch until you complete a java book) will cover your programming needs.
RPG Maker (now available on steam) is a much better choice, but they don't seem to have android support. The developer says they have been working on Android support, but that doesn't mean it's coming any time soon, or that it will even work well.
Character design is not a technical thing. Get a pencil and a notepad and start creating. Figure out what your game is going to be about first, and then design characters that will take on the roles needed. When your design is finished, you'll know exactly what you need and an start working on them in a paint program.
Keep your game small, simple, and focused. If you want to finish it in a year and a half starting from scratch you'll have to dial it back to something small, like 1 town and one randomly generated dungeon. If you can finish that, you can use it as a nice base to keep working on another game after that.