Have: Pinoko
Wanted: Black Jack! Or Sharaku or Wato! Heck, anyone from the Black Jack Anime would be awesome.

Have: Hawke
Wanted: Varric, Fenris, Isabela, Sebastian, Anders, Aveline, Alistair, Zevran, Merrill, Bethany, Carver (basically anyone!)

Have: Harry Dresden
Wanted: Karin Murphy, Molly Carpenter, Michael Carpenter, Thomas Wraith, Mab, Maeve, Lily, Fix, The Nickleheads, Sanya, Bob, Mouse

Have: Agent Washington
Wanted: Anyone and everyone!

Have: Soundwave
Wanted: Decepticons! Especially Megatron, and Shockwave.