Suring the ambush at honnoji Oda Nobunaga on the verge of commiting suicide is stopped for a moment by a being of shining light upon its chest is a Christian cross, he loses consciousness and when he awakens he is riding away with his son Nobutada and his african retainer Yosuki, they manage to get to safety to a nearby castle where they hold up waiting for Hideyoshi, he conferred with Yasuke and his son about his vision, but Yasuke advices Nobunaga caution not to take on Christianity wholeheartedly and advices moderation due to his own experiences with Christianity(which was bad considering he was a slave to a Christian missionary really makes you jaded) Nobutada is just glad his father is alive.
Days later Hideyoshi arrives and announces that due to services rendered to Clan Oda and risking life and limb to save his life Nobunaga publicly raises Yasuke as a Samurai.
During a pivotal battle between Akechi and Nobunaga, he and his generals with Yasuke being his constant shadow bear witness to a meteor breaking up in atmosphere and forming a cross shape in the sky, one of the more learned samurai mentioned the story of Constantine the great, Yasuke is asked privately for his advice and cautions Nobunaga from turning into a Christian Fanatic, In response Nobunaga has a new Sashimono banner made only for himself with a Stylised cross and in the phrase “with this symbol You shall conquer.