The immortal and red head followed the Time Lord to the big blue box that stood outside where no one cared to notice. Jack was smiling, happy to see the old girl again with her new looks but yet to see the inside. Arwen seemed to feel a familiar presence when walking toward the TARDIS. She was all sorts of curious me and wondered what was inside. 
Though when walking inside, the two walking in with awe as they looked around, amazed how the TARDIS looked. "Amazing." They said in unison. "She certainly has changed." Harkness continued. The TARDIS hummed at the recognition of Jack. Arwen and Jack walked over to the console where Arwen gently placed a hand on the surface of it, receiving a soft, smooth hum. "So this is the TARDIS? She'a wonderful." Arwen commented, receiving another hum.