Oboro dealt three major injuries to Takasugi and caused him some of the worst pain he’s ever endured in his life, physically and psychologically. Takasugi owes Oboro nothing and, indeed, fulfilled his promise as one of the two that would put an end to Oboro.
Yet, despite all that, Takasugi chose to take Oboro home to Shouka Sonjuku, to his final resting place.
That, right there, is character growth. That is strength and kindness reminiscent of their teacher, Shouyou.
Truly, Takasugi’s finest moment.
It is one of my favourites, and one of the best and most memorable in Gintama, overall.