As the three entered the abandoned building, they can see that there was a little light inside. As they continued to search, they could hear swords clashing into each other. When they followed the sound of metal, they can see what's making the noise. 

    An angel and reaper were sword fighting.

   The angel was wearing a dress like armor with a purple gem on her neck armor and the reaper was wearing a black skirt and dress jacket with a light blue shirt with matching glasses. The angel had blue eyes and blonde hair while the reaper had green eyes and brown hair. 

   Their swords had clashed into each other, one of them tried to claim victory. Just as soon one of them could surrender, the two fighters look at the three people who have entered their building. 

"Oh, hello my dears!" Grell cries.
"Oh, hello Grell." The reaper girl replies. 

   The angel and reaper had put their weapons away and introduced themselves. "Hello, I am Gabrielle Sharp." The reaper spoke. "And I am Annabelle Sharp." The angel added with a shy tone

"Hello, I am Ciel Phantomhive and this man is Sebastian my butler." Ciel introduced themselves. Gabrielle and Annabelle were full with joy and hope when they have finally meet Ciel Phantomhive in person. They explained everything about their parents and how they have been missing for more than a week. Everyone listened to every single detail and try to think of anything to do to help.
"One question. How do you two know Grell?" Sebastian asks.
"That's an easy one. Grell and I meet when we were partnered up for a soul collecting job. And then I introduced Grell to Annabelle." Gabrielle explained. 

   They all carried out their conversation about the disappearance of their parents. "Maybe it is best if we should keep an extra close eye on the two of you." Ciel suggested. Everyone was confused at first, but Ciel explained it more. Ciel suggests that the Sharp twins should stay in the Phantomhive Manor until the case is solve. Gabrielle and Annabelle looked at each other and decided to go with Ciel and Sebastian.

"Are you sure you and your demon butler can hand this case?" Annabelle asks Ciel with a worried tone.
"You can put your trust in us, Annabelle." Says Ciel.
"But, of course you can trust us and I'm simply one hell of a butler." Sebastian smiles.

   Everyone agreed to the arrangement and started to head back to the Phantomhive manor. Luckily the twins have all the belongs they needed with them already.

   They all had made it to the manor and started to walk inside. Annabelle stepped back a little due to her shyness. Sebastian asked if she was alright. Annabelle said that she was fine and she's just a bit shy. 

"I can see that you might be the youngest twin." Said Sebastian.
"Yes, I am. I'm only three minutes younger than Gabriella." Annabelle explained.

   Gabrielle did say that her twin sister is correct. With everything cleared up, everyone entered the Manor. Sebastian told the twins to wait right where they are and went to go get the servants to introduce themselves to their new guests.