Why you gotta make this hard Natsuo, though I guess you were closest to Toya perhaps.
Distance should hopefully make things better, will patientiantly await for Natsuo to come around and not at like Endeavors death bed or some other random overly dramatic plot like that. Also I wanted to see him use his quirk.
Awesome arc, Endeavor has had the best character development over the course of the series, followed by Shoto, and Kirishima, and Shigaraki. Hopefully everyone gets even more developed the whole series.
Guessing Baks will tell All Might or Aizawa his name first, canonically can't think of anyone else apart from his parents.