Regarding her relations with Kasuga no Tsubone, an episode states that Eishoin set up an occasion for Kasuga no Tsubone to meet Ieyasu who was staying in Sunpu to assist her in Iemitsu becoming a successor of Hidetada.
春日局との関係では、駿府にいた家康に会わせ、家光が秀忠の後継となることを助けたという話がある。