The Lost Species {OLD!}

Part 5- "Is that a THREAT?"

(About the picture: Thunder is laying on his tail? Idk. This picture looks stupid...;n;)
After the kiss in the garden, Glacier fell asleep and Thunder carried her off to her room. He went to his own, and fell asleep too.
Time Skip
His alarm clock yelled at him to get up, eventually persuading him with its beeps despite his body begging him not to. He took a shower, brushed his teeth, put on his armor, then he stood guard in front of Luna's room. "Where were you? You're late!" Silver Blade scolded. "Sorry, I had to do something late last night."
"Did one of the princesses tell you to do it?"
"Well, not directly. Princess Celestia would've wanted me to do it." Luna opened the door, and they went silent. She trotted quickly down the hallway, looking for Glacier's room. She finally saw a room that had a sign with an icicle engraved on it, and knocked on the door. She quickly opened it. "Hi, Luna. Did you need something?"
"Yes. May I come in?"
"Of course." She came in and they both sat on the bed. "Glacier...I know what happened last night. In your dream."
"H-h-how?"
"I was there. I have the duty of overseeing ponies' dreams and helping them. I also heard a small scream and crying." Glacier looked sad. She had just woken up and now she was reminded of the worst thing that ever happened to her. "That's interesting." She put her hoof on hers. "Glacier, we are worried about you. Thou seems to always just bottle up all this pain, anger, resentment and sadness, but it only makes things worse. We do not want you to end up like us. Thou is going down the same treacherous road that we went down. It did not go well."
"Thanks Luna. I'll start expressing myself more and speaking my mind."
"We thank thou. Will thou be down for the early meal?"
"No. I'm not hungry." Thunder watched the conversation and grew more restless by the second. "I have to go talk to her."
"Thunder! Thunder Storm, get your flank back over here! You can't leave your post!" Silver Blade loudly whispered. "This is part of my job! I have to take care of her." He trotted to her door, and she saw him. She giggled. "Thunder, what are you doing?"
"Just...um, checking on you."
"Okay then. I need to go stretch my legs." She trotted around the castle, exploring all of the stairways, and Thunder followed. She abruptly stopped in front of Celestia's door, which was cracked open. "Oh! I just remembered. I have an errand to run." She trotted off, and Celestia mouthed: Follow her. He did as told, and galloped up to her. "Hey, uh, do you mind if I tag along?"
"You can come, but don't you have guard stuff to do?"
"I was asked to accompany you, or help you. This is what I'm supposed to be doing."
"Okay." Glacier flew to Ponyville and visited Twilight. She knocked on the door of the Golden Oak Library. "Hello, can I help...Glacier?"
"Hey, it's me. Just wanted to stop by and see what you're up to."
"Shouldn't you be with Princess Luna?"
"It's early morning, and they're just getting breakfast right now. I don't need to." Twilight looked behind Glacier. "I see you brought...him."
"Thunder. He's like a...bodyguard. Well, not really, but he just accompanies me where I go." Twilight giggled. "Well, you and your lost dog should come in." Thunder blushed. "He's not a lost dog. He's my really good friend."
"I think that blushing means it's something else." Glacier facehoofed. (Facepalmed) "Whatever you say." They walked in. "Wow. This place is huge!" Her voice echoed the room. "I'm living here now, and I'm here to make friends. I can't believe I ever lived without them."
"Well, I'm glad that you finally got out of the house and talked to ponies."
"I talked to ponies back in Canterlot!"
"Who were your friends?"
"Easy! There was...um...and her..."
"What? I didn't quite hear you." Glacier teased. She giggled. "Okay, okay, I was a bookworm. What's more important is the fact that I'm not anymore." Glacier smiled. "Good to know. I have stuff to do, so maybe I'll see you in a few days?"
"Absolutely." They walked out. "I am NOT a lost dog!" Glacier laughed. "Come on, Thundy! She was just teasing." Glacier flew to the edge of the Everfree Forest. "Glacier? Why are we here?"
"Come on." She trotted in, and Thunder hesitantly followed. They came across a beautiful and peaceful looking place in the forest. "What is this place?"
"I used to come here when I was little. It would make me forget about everything and be happy." She relaxed in the pool of water, and Thunder went to go explore the place. He went through a few trees, until he was suddenly pinned down and his mouth was covered. "Mmph! Mmph-AH!" The attacker uncovered his mouth, and Thunder realized that he was tied down. "Show yourself! What are you doing?!" The unknown pony that rode under the royal chariot stepped out from the shadows. "Hello, Thunder." His eyes widened when he said his name. Thunder scanned the stallion's features more closely. He was interesting. He was a unicorn, except that half of his body was metal. His eyes were a dark blue, his cutie mark was a welding torch, (if that's what it's called) and his mane was black with silver. "Hello. I am Titanium. You are going to do a favor for me." Thunder was pissed off at him. "You're going to bring Glacier to me. I will be waiting at this very place."
"Why would I ever do such a thing?!"
"Because if you don't, it means your death." Thunder snorted. "Is that a THREAT?"
"Oh, it is if you care about your little marefriend. And I'm going to leave you something to remind you not to fail me." He went over, pressed a button in his hoof that revealed a claw, and scratched a scar in Thunder's face that went across his eye and down a bit of his cheek. "Don't tell anypony, or it means your death or worse. You have two days." Titanium broke the ropes tying him down, and walked away. He immediately put a hoof on the scar to see if it was bleeding, and it was bleeding heavily. He washed it off in a puddle, and staggered back. He had to do something.