**Battōjutsu Revival**

As Yelena stood ready, her katana at the ready, she felt a surge of adrenaline coursing through her veins. The Red Room agents, emboldened by their numbers, charged towards her and Natasha. The air was electric with tension, the sound of children's laughter and playful shouts from the park's patrons replaced by the ominous hum of impending violence. With a swift motion, Yelena unsheathed her katana, the blade glinting in the sunlight like a shard of ice. She held it in her right hand, the scabbard still clutched in her left, a familiar and comforting presence. The agents, taken aback by Yelena's sudden display of steel, hesitated for a moment before regrouping and pressing forward. The sound of clashing steel and the scent of sweat filled the air as Yelena unleashed her battōjutsu skills, a style of Japanese swordsmanship that emphasized quick, precise sword slashes. Her technique was a testament to her years of training, her movements fluid and deadly. She wielded Yamato with one hand, using the scabbard in her other hand to block and deflect incoming attacks. The agents, armed with guns and knives, were no match for Yelena's precision and speed. She sliced through them with ease, her katana biting deep into their defenses. Natasha, watching with a mixture of awe and concern, joined the fight, her own skills honed from years of training. Together, the two sisters were a whirlwind of steel and motion, their movements fluid and practiced. Yelena's sword sliced through the agents with deadly precision, her technique a blur of speed and accuracy. The agents fell, one by one, their bodies crumpling to the ground. As the battle raged on, Emma watched in awe, her eyes fixed on her mother. Yelena was a force to be reckoned with, her katana slicing through the agents like a hot knife through butter. Natasha, fighting alongside her, was a skilled and deadly opponent, her movements a testament to her own training. The agents, desperate and outmatched, began to falter. Yelena sensed victory within her grasp and pressed her advantage, her sword slicing through the air with deadly precision. The sound of clashing steel and the scent of sweat filled the air, the battle reaching its climax. In a final, decisive blow, Yelena struck down the last agent, her katana biting deep into his defenses. The agent crumpled to the ground, defeated, and Yelena stood panting, her chest heaving with exertion. Her katana, still clutched in her hand, seemed to hum with power, a testament to her skill and training. Natasha approached her, a small smile on her face. "You're still as deadly as ever, sister," she said, her voice sincere. Yelena smiled, feeling a sense of pride and satisfaction. She had protected her daughter, and that was all that mattered. As she turned to Emma, her expression softened. Her daughter stared at her, eyes wide with a mix of fear and admiration. "Mommy," Emma said, her voice trembling. Yelena knelt down, her sword still clutched in her hand. She pulled Emma into a tight hug, holding her close. "I'm sorry, baby," Yelena said, her voice barely above a whisper. "I didn't mean to scare you." Emma looked up at her, her eyes shining with tears. "You're a superhero, Mommy," she said, her voice filled with awe. Yelena smiled, feeling a sense of pride and purpose. She was a mother, a protector, and a warrior. She would do whatever it took to keep her daughter safe. As they hugged, Natasha approached them, her eyes filled with a mixture of concern and admiration. "You make a great team, Yelena," she said, her voice sincere. "You and Emma." Yelena looked up at her sister, her eyes searching for any hidden agenda. But all she saw was genuine concern. For a moment, they just stood there, the tension between them dissipating. Yelena knew that this was just the beginning, that the Red Room would not stop until they achieved their goals. But for now, she had protected her daughter, and that was all that mattered.