i find how people confused that coco is still with inupi in the new timeline and realized its because most fans don't really understand that the fire wasn't the reason kokonui got close. that was the reason they stopped being close.
they have been best friends since childhood. their bond was so strong that despite all traumas and complicated relationship they were together and fell apart only for logical end - they chose each other and continue to choose each other.
koko always followed seishu. he followed him in his gang business, he helped him find a leader for the black dragons, he helped him deal with money matters and informing. he was here for him all the time and in the new timeline we see that even if there is no fire and trauma — he will still do it. he would still be with him. still help him.
now it confirms that koko is sincere and pure in intention from the very beginning.