Akutagawa carefully hides his regression. Almost no one saw him in this state except his sister. he's very serious and intimidating at work, so he doesn't want to ruin that image. also, he is afraid that he will be misunderstood and laughed at, so he is very ashamed of his habits. when he begins to regress, he behaves very childishly and can even become hysterical. if he wishes, he can come up and hug the person tightly, but only if he really trusts the person