If you ask Leo how he will treat Sienna in the end, then Leo's answer is very simple, just two words: kill!
And Bucky was the one to kill her. After all, Bucky's hatred for Sienna was already overwhelming and he had long wanted to kill her.
As for what benefits Leo can get from Sienna, Leo really doesn't get any actual benefits.
The best thing to do is to try to interrogate the whereabouts of the remaining Hydra members before killing them, but with Sienna's temperament, it is estimated that the interrogation is unlikely to yield results.
Furthermore, after killing it, the [Immortal Hydra] mission should be completed a lot longer.
Besides that, Sienna actually has no value to Leo anymore.
But Natasha's words provided Leo with a new idea.
He, Leo, doesn't need fame, but Fury might!
If Sienna is handed over to Fury and others think that Fury killed the leader of Hydra, then Fury's own reputation and status within the US government will be greatly enhanced.
Of course, Fury couldn't get away with nothing. How could Leo get some actual benefits such as money from it?
Furthermore, Leo actually wanted to dig a hole for Fury, if Pierce knew that it was Fury who killed the leader of Hydra, and Fury destroyed many of Hydra's bases a year ago.
In this way, the old and new grudges are settled together. Pierce will be considered a saint if he can bear not to retaliate against Fury, let alone pass the director's position to Fury in the future.
Of course, Pierce cannot be a saint, so Fury may face suppression, difficulty, or even assassination from Pierce.
It just so happened that although Fury knew that Pierce was a spy of Hydra, he was powerless and could not change the fact that SHIELD was a Hydra agent in a short period of time.
So, when Fury was powerless and his face's safety was threatened, Leo offered to help and even pushed him to the position of director. Should Fury accept it at that time or not?
In this way, Leo could get more benefits from Sienna, so when Natasha said she wanted to call Fury, Leo didn't refuse.
Maybe it was because Fury happened to be sleeping, so Natasha dialed two numbers in a row before getting through to Fury.
Natasha made the call using Leo's mobile phone, and Fury didn't recognize the phone number displayed on the mobile phone, so Fury didn't know who was calling, so he asked doubtfully:
"I'm Fury, who are you?"
Fury was woken up at four o'clock in the middle of the night, and he usually slept very late, so his voice sounded a little tired at this time.
But for some reason, when Natasha heard Fury's tired voice, she felt a little happy in her heart, similar to the feeling of pleasure when revenge is successful.
However, Natasha would not show this emotion. She suppressed her secret joy in her heart and said:
"Sir Fury, my name is Natasha Romanoff. I have something to report to you."
Now Fury regained his energy, and all the fatigue in his body was gone. However, he was still more vigilant and asked first:
"Agent Romanoff, why didn't you call me from a familiar number but this unfamiliar one? Where did you make the call?"
"This is Leo Irvine's mobile phone number. I am at El Technology Company now, and Mr. Irvine is also with me now."
Natasha explained,
"Actually, it was Mr. Erwin who asked me to contact you."
"Oh, please wait a moment. I'll put a password on the phone first and I'll call you later."
Fury said.
Since Natasha turned on the speakerphone, Leo heard Fury's words clearly from the side. At this time, Leo interrupted:
"Mr. Fury, don't go to such trouble. This phone call is already encrypted. If you have anything to say, you can feel free to say it."
Fury then remembered that Leo had his own phone encryption technology, but he still asked slightly confused:
"After the phone is encrypted, it will display garbled characters, but your phone number is obviously a normal one?"
"This mobile phone number is my virtual one. If you press the phone number to call back, you may not know who you will call!"
Leo said disdainfully,
"Your phone is encrypted and displays an unknown number. Doesn't this mean there is something wrong with telling others about this phone number? So it is better to use a virtual number."
Although Fury wanted to refute, he knew that he was not here to discuss technology with Leo, so he put the topic of phone encryption aside and started talking about business.
Natasha first introduced everything she knew to Fury, then handed the phone to Leo and asked Leo to talk to Fury.
She looks very much like Leo's personal secretary.
"Mr. Erwin, what deal do you want to make with me?" Fury asked first.
"Do you want to take the credit for killing the leader of Hydra?" Leo was very direct.
But Fury's thinking was indeed different. He did not consider credit first, but asked:
"Kill?! Mr. Erwin, to be honest, the living Hydra leader is worth far more to me than the dead one."
"Sorry, Mr. Fury, due to some reasons that are inconvenient to tell you, Sienna Schmidt must die, so all you can get in the end is a corpse."
It was impossible for Leo to let Sienna leave El Technology Company alive. Leo would not be stupid enough to do this kind of plot on TV where the tiger returns to the mountains.
Fury was silent for a while before speaking:
"In the past, I might have been happy to accept this honor. But now, with SHIELD being full of Hydra spies, if I accepted this honor, I would be courting death."
Fury was indeed very smart, and he immediately considered the pros and cons of the matter, and walked through the hole that Leo originally planned to dig for him.
However, Fury didn't say anything, and he didn't explicitly refuse to cooperate with Leo.
Leo then began to persuade:
"Mr. Fury, you don't think Pierce will let you go, do you?
A year ago, you destroyed dozens of Hydra bases, and you have long since become unrelenting enemies. He may not kill you now because he is afraid of being publicized, but liquidation in the future is absolutely inevitable.
Don’t you think about your future?”
Leo went on to say,
"I gave you my credit for free and you didn't dare to accept it. I said I would take the initiative to help you solve Serpentis and Shield, and even sent you all the way to become the governor, but you refused.
Do you like having people shit on your neck so much?!"
Free remained silent, it was obvious that Leo had touched upon his sore point.
If he didn't know that Pierce was a HYDRA agent, he might still foolishly work for SHIELD and do his best to make SHIELD better.
But now he already knew that although he didn't show it on the surface, he was really very scared in his heart.
It's not that he is afraid of death. As early as when he was a spy during the Cold War, Fury had already put life and death aside.
His main concern is what will happen to this country and the world after he dies.
In fact, Fury left Natasha with Leo at that time, and had already expressed his intention to seek help from Leo in the future.
But the conditions Leo proposed last time were too harsh, and he actually wanted to be the boss behind S.H.I.E.L.D. Fury was very angry at the time, so he rejected Leo.
But after two months, Fury gradually thought about everything clearly.
Although he now has a list of Hydra spies, no one will believe Fury's words without any evidence and only relying on a list of unknown origins.
After thinking about it, Fury suddenly realized that if he wanted to deal with Hydra's spies in S.H.I.E.L.D., he seemed to have to rely on Leo.