A little bit of history first: During the late 90's and early 2000's through several appearances it looked as though the Juggernaut aka Cain Marko was being transitioned into a less villainous character. While it wasn't always consistent (and continues to be inconsistent) the push to make him more likeable was evident.
A salient example of this, the mini-series X-Men Forever from writer Fabian Nicieza and artist Kevin Maguire. A primary character through the time-jumping events of the series, Juggernaut comes to realize he had wasted his life. By the conclusion of X-Men Forever #6 Cain is returned to jail but is soon released, having made an agreement with the Commission on Superhuman Activity to work as a bounty hunter in exchange for a reduction of his sentence. One of the conditions of his work furlough release states he must report to a Ms. Yama.
This is a nice nod to the established history of Sachi Yama in the MC2. Sachi first appears in J2 #1 where we learn that she fell in love with and eventually married Cain Marko. This is further elaborated on in J2 #7:
Sadly, this new direction for the Juggernaut was dropped almost immediately and to my knowledge we haven't seen Sachi Yama appear in the Main Marvel Universe since. It'd be interesting to hear what Mr Nicieza had planned for Sachi and ol' Juggy.
Until I decide to reform and join the X-Men, I remain
frogoat