For the next few weeks, Danny watched Malfoy invisibly like he watched Harry the previous year. He still disliked the teen as he was a rather pompous person. He regularly muttered unkind words about Slughorn and Harry and his friends. Danny also teleported into London to attend lessons with Miss Fisher. All his progress with her was sent to Casper High and documented which meant it counted so that he kept up with Sam and Tucker without attending the school in months. However whenever he went to London, he'd spend a couple of hours searching London, willing for his ghost sense to go off. But he never found anything. At the weekends, he spent a few hours in Amity Park, now that he could teleport home without getting sick, he was going to utilise it.

It wasn't until the beginning of October when something happened. Danny was floating down a corridor, smiling kindly to students who called greetings to him.

"Hey Danny!" Harry called, heading to the common room to do some homework.

"Hi Harry. How's things?" Danny replied. Ron emerged next to Harry.

"Where's Hermione? Hey Ron," Danny added.

"Hermione's in Arithmancy," Ron answered.

"And we're doing alright. Busy though. You?" Harry retorted.

"Nothing to report," Danny joked, Harry and Ron smirked.

"Do you know where Dumbledore keeps going? He doesn't seem to be around much," Harry asked. Danny shook his head.

"Sorry, no. I haven't spoken to him in a few weeks now. But I'm sure whatever he's doing is important," Danny answered honestly. He'd resumed asking Miss Fisher when she wanted to set their next lesson despite Dumbledore having returned and was capable to organise the lessons. He also felt awkward around the wizard and so limited his visits as much as possible.

"Do you know how he hurt his hand?" Harry inquired curiously. Danny blinked in surprise. He hadn't expected that question. And worse, he did know the answer but he wasn't in a position to explain. So should he lie and say no? Or should he say yes but say he was sworn to secrecy on the how?

However he was saved from having to answer by his ghost sense going off. At first, he was relieved before he realised it was the first time in months and he was in Hogwarts. The resident ghosts didn't trigger it.

"What was that?" Ron gasped, staring at the puff of blue mist that came from Danny's mouth.

"Something bad," Danny muttered and began to look around for the ghost.

"What do you mean? Something bad," Harry prompted worriedly.

"My kind of ghost is nearby," Danny answered distractedly.

Suddenly there were screams from the end of the corridor and a large green and black mass charged down the hall towards Danny. Harry and Ron pulled out their wands and pointed them at the ghost. Danny spun to face the ghost and before he got a good look, the ghost pounced on him and forced him back into a suit of armour which fell over.

"Danny!?" Harry shouted worriedly. But Danny finally recognised the ghost and laughed as he attempted to gently free himself.

"Get off! Wulf!" He chuckled.

Harry, Ron and a number of other students watching the scene, blinked in shock and confusion.

"Amiko!" the ghost exclaimed happily. (Friend!)

"Yeah yeah! Good to see you too. But get off!" Danny replied with a broad smile. The ghost stood up and revealed himself to be a large werewolf-like being with thick shaggy black fur and dog-like face. He wore a short-sleeved green hoodie and matching trousers. The ghost sniffed the air and scanned the crowd of students with pupil-less green eyes. Danny got to his feet and cracked his back, he was covered in green slime.

"It's alright guys. This is Wulf, a friend of mine," Danny called to the students. Wulf turned to Danny.

"Amiko, kiuj estas tiuj homoj? Por kio vi venis?" Wulf inquired. (Friend, who are these people? Why are you here?). Danny turned to Wulf and groaned softly.

"I really need to learn Esperanto better," he muttered. Harry and Ron glanced at the halfa, confused.

"He can only speak that language. He understands a little English, but one of my friends is way better at understanding Wulf than I am," Danny explained. Danny frowned in thought.

"Wulf… kion vi faras… ĉi er tie?" Danny asked carefully, clearly not fluent. (Wulf… what are you… doing er here?). Wulf grinned.

"Sercxas," the ghost answered. (Looking for you). Danny blinked.

"For me? Ĉu… io malbona… okazis?" Danny inquired worriedly. (Did… something bad… happen?). Wulf shook his head. Danny gave a sigh of relief.

"What's he saying?" Harry prompted. Danny shook his head.

"He's just here because he was looking for me," Danny translated.

"Oh my," McGonagall gasped as she rounded the corner. The remaining students, Harry, Ron, Danny and Wulf turned to her.

"It's alright. He's harmless," Danny assured her. McGonagall nodded before frowning at the gathered students.

"Off you go! You have homework no doubt to be doing," she ordered sternly. The students reluctantly left, glancing curiously back at the new ghost. Harry and Ron stayed behind. Danny turned back to Wulf and laughed as the ghost grinned at him before sniffing the air.

"Wow, of all the ghosts that could find me, I'm sure glad it was Wulf," Danny remarked.

"Are you good friends then?" Ron asked carefully. Danny smiled and nodded.

"Wulf has helped me out of some really tough spots in the past," Danny confirmed.

"So, could he help you now?" Harry inquired curiously. Danny blinked before holding his chin in thought.

"You know what. He could. But I'll need to know Esperanto a bit better first. Communicating isn't easy when we can't understand each other," Danny replied. The students nodded in understanding.

"I think you should inform Professor Dumbledore, Phantom, about your friend," McGonagall suggested. Danny nodded in agreement.

"Probably for the best. Um… Wulf!" Danny agreed and beckoned the ghost to follow him. Wulf complied happily and both ghosts floated through the school to Dumbledore's office. Danny paused only to knock on the wooden door and to get permission to enter.

"Sorry Professor. But I have a friend visiting. Meet Wulf. Er, he speaks in Esperanto," Danny informed the wizard. Dumbledore smiled warmly and got up to greet the new ghost.

"Saluton Wulf. Mi estas Albus Dumbledore lernejestro de Hogwarts," Dumbledore introduced himself. (Hello Wulf. I'm Albus Dumbledore, headmaster of Hogwarts).

"Saluton. Mi bedaŭras por entrudante. Mi estis nur koncernas mian amikon, kiel li ne estis hejme ĵus," Wulf apologised. (Hello. I'm sorry for intruding. I was only concerned for my friend as he hasn't been home recently). Dumbledore smiled warmly.

"Tuke komprenebla Wulf. Neniu damaĝo farita. Ĉu vi violas resti en mia lernejo kaj reacquaint mem kun Danny? Okazos kelkaj reguloj kompreneble vi devas resti," Dumbledore replied kindly. (Completely understandable Wulf. No harm done. Would you like to stay in my school and reacquaint yourself with Danny? There will be a few rules of course should you stay).

Danny blinked in shock.

"You know Esperanto?" he realised. Dumbledore smiled and nodded.

"I do. I gather that you don't?" Dumbledore confirmed.

"Nothing like you. I know a few phrases. Enough to get by. Nowhere near fluent. Could you teach me?" Danny answered, slightly in awe of the wizard. Dumbledore laughed softly and quickly agreed. Wulf decided to stay and was told to not disrupt classes and to not frighten any students. The ghost was given the option to choose his favourite haunts while he stayed as long as it wasn't in any common rooms. The ghost was also informed a little about what Danny was doing at Hogwarts.

In the books it's mentioned that Dumbledore knows a lot of languages, without looking it up, I think I remember reading it was seventeen. So why not Esperanto? Most stories I've read, and I'm guilty of it too, make Danny fluent when Tucker isn't, seen in the show. So… Dumbledore is going to teach Danny.

This is where things definitely start to split away from the book. There will be a few chapters that follow the book but this section really only follows it loosely.

Let me know what you guys think.

Until the next chapter.