Kuroh Yatogami from the anime K. In his younger teenage years I use Kirito. Sometimes I use Noctis from FFXV as well for Joshua.

Amelia uses Flandre, Tsuzura Wakasugi, or sometimes Rin Kagamine. Older versions, witch I've never used as I've never gotten that far, might be Ellis from El Cazador de la Bruja or Blanc from Hyperdimension Neptunia.