Sojobo-Tengu was killed between pages of X-Men Legacy (2nd series) #4 when the disembodied eyes of Luca Aldine ripped out his own eyes and implanted themselves in his dead form, animating it. Sojobo died completely once Luca was driven out in #6.
Sojobo Tengu's status after X-Men Legacy (2nd series) #24 is unclear. Legion was partly responsible for bringing him to the Jean Grey School, so when he edited himself out of history, the Tengu twins may not have ever reached the X-Men. If Legion was uninvolved in his life, Sojobo may not have been targeted and killed by Luca. Karasu-Tengu was apparently one of Volga's test subjects in X-Force (4th series), but her brother did not appear to be present.