Your Neptune

Neptune: "Uranus~ We're back!" You said, appearing with Iris, spooking Uranus.

Uranus: "And... Are you Iris? The missing one?" He questioned.

Neptune: "You know Iris too? How could I not know?" You asked.

Uranus: "You forget almost everything Neptune!" He reminded you, then looking at Iris. "It's just that he's always hiding! He changes so much!"

Suddenly you felt something cross the Kuiper belt, as you had a sense that knows when something crosses the Kuiper belt. You turned towards the Kuiper belt abruptly, Iris and Uranus looking confused.

Neptune: "Something just crossed the Kuiper belt! I need to go!" You said, speeding off so fast, that they recoiled, before following you.

Once you got there, you were holding a trident, as you do every time something crosses the Kuiper belt.

Neptune: "Stop there my friend-" You paused, your eyes widening. "Oh, it's you..."

Planet X: "Hello again, Neptune." He said, in a calm voice.

Neptune: "You're not allowed in here! Get out!" You yelled.

Planet X: "What? Are you the watchdog now?" He teased.

Neptune: "I 'm the watchdog...?" You said, your eye twitching. "But I was trusted to be this watchdog. Unlike you, who were thrown away."