After Shimura Danzō died, Sarutobi Hiruzen lost a convenient set of white gloves and now had no choice but to handle these unsavory matters himself. Environment shaped a person, and Sarutobi Hiruzen's current mindset grew increasingly dark and extreme.
Presently, knowing Tsunade and Jiraiya's stance, coupled with their powerful influence in the village, Sarutobi Hiruzen wanted to strike first and gain the upper hand.
Jiraiya was fine; after all, unlike Tsunade, Tsunade not only had an extraordinary background, with numerous clans acknowledging her as the Senju Clan's final bloodline, but she had genuinely saved many lives. Tied together by mutual village entanglements, she naturally exerted massive influence.
Jiraiya was merely a battlefield commander. Once the war ended, his status could no longer command everyone, nor was there anyone standing firmly behind him to support him. Most of the time, his personality led him to choose avoidance, and combined with his love for the village and his comrades, Sarutobi Hiruzen believed that as his teacher, he had plenty of ways to manipulate him.
Therefore, Sarutobi Hiruzen conceived the idea of getting rid of Tsunade first and completely devouring the remaining heritage of the Senju Clan.
Moreover, as a Medical Master, Tsunade possessed combat capability inferior to combat-specialized ninjas and suffered from hemophobia. Right now, even he, the Hokage, did not know she had returned to the village, so naturally, others did not know either. This was precisely the best time to deal with her.
When the time came, as long as he exploited her fear of blood, he could quickly end the battle. Aside from Jiraiya, no one would know, and given Jiraiya's personality, for the sake of the village's stability, he would only be forced to acquiesce or even be directly driven by him.
Yet this idea was nipped in