The best replacement for riku is roxas.

The best alternatives to riku are rated as following:
★★★★★  roxas
★★★★  sora
★★★  ansem
★★  zexion
★★  xion
★★  terra
★★  young xehanort
★★  riku
★  lexaeus
★  vanitas
★  xemnas
★  axel
★  risa
★  rikku
  vexen
  riku replica
  ventus
  marluxia

Your alternative for riku is not listed? Suggest!
Speaking about riku, one probably shouldn't forget about sora.

Other search terms related to riku and their ratings are:
★★★★★ sora
★ daisuke
★ way to the dawn
You have in mind a companion for riku and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of riku in all years. Click on graph for more.
riku
roxas
sora