Talk:Halloween 2018/@comment-33784096-20181029084005/@comment-4802891-20181029100808

Extra Rin is a cameo. It was explained that when Ishtar appears, her sister will be summoned as well although she will be stucked in the underworld. She can however use the Saint Graph of Ishtar to communicate, although she can't use her abilities in that state.

Basically, this is not Extra Rin, the appearance is just there for fanservice.