Players are able to swap a Kami in their party for a random Kami in the Vending Machine Gacha Pool. This is referred to as "Rerolling" a Kami and costs one Reroll Ticket.
Players may choose to re-roll a Kami for a variety of reasons, such as:
Seeking a Kami of a particular Type or with particular Traits.
Punishing one of your current Kami for bad behavior.
Reroll Tickets are auctioned in-game at the Vending Machine, much like Gacha Tickets. However, Reroll Tickets are priced in Onyx Shards and have an infinite supply.