It was declared in Riverdell, as a symbol of its members' commitment to the cause of finding and rescuing Ciri. Whereas up to this moment the companions considered themselves or each other more or less a rag-tag group of free agents, from this point on they became a unit, a singular entity with a common goal, supporting and depending on each other, under Geralt's leadership.
The rest of the party, with the exception of Geralt (and Dandelion), died during the assault on Stygga castle.
- Each of the members of the hanza had their own reason for following Geralt:
- Milva wanted to deal with her regrets, she felt she had neglected her unborn child.
- Cahir fell in love with Ciri and hence wanted her safety.
- Angoulême wanted to pay off her debt of honour.
- Cahir explains that the word Hanza (or Hassa) derives from the Nilfgaardian phrase "aen hanse" meaning "an armed gang, but one linked by bonds of friendship".
- The declarations of membership made by the party members resemble a similar oath that the Fellowship of The Ring made in Rivendell, in The Lord of the Rings by J.R.R. Tolkien.