I'm just using this picture because it has two of my favourite characters together.
On the left is Adol Christin, from the Ys series. He doesn't speak (usually), but even so, Adol is like the king of adventurers. Unlike say, Link, where we usually only see one of his adventures and then change to a different one, Adol's the same guy saving all these different lands from disaster and always making some fine ladies fall in love with him, only to leave them and look for more perilous situations for him to solve.
On the right side, Estelle Bright. She's the heroine of Trails in the Sky/Sora no Kiseki FC and SC, and daughter of one of the most brilliant guys in the land. I find JRPGs usually have some very undecided leads, who are constantly questioning themselves, so Estelle is a pretty big thing for me, because her personality is just so bright (hah) that every moment she's on screen is pretty nice. Plus, despite all the things that happen to her, she's still pretty damn strong willed and's always trying to make the most out of life.
Wanted a good picture of the FE4 artwork but couldn't find it, so we'll roll with this. Celice/Seliph from Fire Emblem: Seisen no Keifu is probably my favourite FE Lord and one of my favourite characters. As many other Lords, some people might find him a bit cliche, with being good and respecting others and what not, and while I don't particularly disagree, FE4 just pulls some great twists when introducing the children characters and Seliph's whole ordeal just pulls me in.