ZGS4-00Z1 Gundam Build Exia

The  (AKA Kusanagi or Kusanagi-no-Tsurugi (草薙の剣) is a variation of both GAT-X105B Build Strike Gundam and GN-001 Gundam Exia. It is the personal Gumpla of Ryujin Roma who was given it by his friend Sean Canavan