Hello, Natara here.
Today from 18:08 (GMT+9) there was a temporary error of needing more hunter traces to recruit a ★1 hunter than before.
At 18:30 (GMT+9) this issue has been fixed, and now the number of ★1 hunter traces required for recruiting has been normalized. So, please take note of that when playing the game.
If you still see the irregular numbers then please close and restart the app, and the normal numbers will be applied.
We apologize to the users who experienced this inconvenience.
We will do our best to show you better service.