Black and Zamasu were shocked. After such a long time she'd returned. Rosy was covered in the darkness. She couldn't look at them, she just stared at the ground.
"Black..is that-", Zamasu was cut off by Black taking his arm and flied to Rosy. "ROSY!" Black cried as hugged his daughter. "Oh Rosy, I thought I've never see you, I'm so sorry, it's all my fault!", Black sobbed. Zamasu hugged Black.

"F....Father?"

Black looked up at her. "It.....hurts....h-hełp.", Rosy said softly. Rosy has been hurt, but never cared or felt anything about the pain. "It's going to okay, I'm here dear, don't you fear sweet pea.", Black said as he hugged her tightly.
Zamasu looked at Rosy. She's in pain, a strange kind of pain. Zamasu put his hands on her chest and healed her. She felt relief and thanked him.
"So, you must be the one that my father is in love with?", Rosy asked. Zamasu nodded. Black said, "Don't worry Rosy, I will find a way to bring you back to reality." Zamasu saw how her arms were covered in darkness, he grabbed one of the arm and tried to pull it.
"Zamasu , I appreciate the gesture, but there is no way to break-", Rosy was cut off. Zamasu set her body free from Ketsueki's magic. She looked surprised.
"Interesting..you managed to free me?", Rosy questioned, "Though just how do the both of you expect me to get out of here?" Black put her on his back, Rosy held on tight.

"This time I won't let go."

They couldn't see nothing but pitch black. "Rosy, do you know a way out of here?", Zamasu asked her. Rosy shrugged. Black saw a bright light from the distance. The two including Rosy, ran to the light.
Soon the three were out of the darkness and into the light, which was clearly the outside. "We did it, now we can be together again Rosy!!", Black cried out in happiness. Zamasu smiled and tapped Rosy's back.
"Yes we can, but...Ketsueki, he is still a threat and...my strength it needs rest.", Rosy said softly. Zamasu held Black's hand and the three went back to their cabin.
                                      *****
The three went to the terrence and sat there with their tea. Rosy ate her little bento that Black always made for her when she is hungry.

"So Rosy, is your strength feeling any better?", Zamasu questioned as he took a sip of his tea.

"My strength feels better now", Rosy answered.

"Black, we have to defeat Ketsueki, he won't stop until the three of us are dead", Rosy said as she looked into Black's dark eyes. " I know, but how, if I kill him, you will die", Black replied in a nervous tone. "We have only two options Black, killing Ketsueki or killing him by fusion.
Zamasu eyes widened. Black fusing with his daughter. Seems strange and ironic. "Fusion, we never fused before, what benefit will that make?", Black said as took a sip of his tea.

"Wait, how will you fuse, you don't have a second earring.", Zamasu asked.

"I do have the second red earring, but it's far to dangerous to lend it to anyone, including Black", Rosy replied, "My red earring holds not only fusion, but darkness, it can kill anyone." Zamasu eyes widened in fear.

"Black, don't fuse with her."

"Zamasu, I know your fear that I will die, but I don't want Rosy dead", Black said as held Zamasu's hand, "This body maybe fragile, but it's the only way." Zamasu teared up a bit. Black squeezed his hand a little.

"Zamasu, it can kill anyone, but I know Black will survive, trust me, he is your lover.", Rosy replied softly. "Rosy, do you still have that sword?", Black asked. Rosy nodded and stand up to summon her sword.
When the sword was summoned, it looked exactly the same as before. The red dark energy sword filled with her darkness was making Black shiver a little.

"That's a powerful sword, worthy of a 'killer'", Zamasu said and smiled.

Rosy nodded. " This sword could damage Ketsueki, but not kill him, he is afraid of this sword."

Black stood up and added: "Tomorrow we will confront him, right Rosy?". Rosy nodded. The three went inside and sat on couch. Black thought in his mind:
"I've never thought she would return, her energy has increase, and mind seems to be the same...fussing with my sweet pea...I need all my energy for that and hopefully Zamasu can heal me."