Board Thread:Theories and Speculation/@comment-9338136-20180716151639/@comment-6769189-20180717094510

Georgio722 wrote: Since Choku Tomoe means Straight Tomoe, and only Sasuke and Izuna had straight ones, it has to be either referring to EMS, or something that's Indra reincarnation specific. Izuna wasnt the reincarnation of Indra.

Maybe it refers to MS that have a straight pattern?