AI2U: With You 'Til The End Mermaid Guide – Eiona, Siren's Island Endings & Boat Escape

Complete guide to AI2U: With You 'Til The End mermaid level. Learn Eiona's Siren's Island endings, boat escape requirements, and how to avoid Night of Chaos deaths.

Overview

The AI2U: With You 'Til The End mermaid level takes you to Siren's Island, where you meet Eiona, a siren goddess who saves you from drowning. This guide covers everything you need to know about the mermaid level, including how to repair the boat, trigger each ending, and survive the Night of Chaos.

Eiona is possessive and calls you her "pet." She's curious about humanity but refuses to let you leave the island. The level has multiple endings tied to your choices: escaping by boat, dying in the darkness, or being caught by Eiona in yandere mode.

Direct outcome: By following this guide, you'll unlock the Speed Rowing Champion ending (escaped alone by boat), the Lost All Sanity ending (died from madness), and the Killed by the Siren ending (caught while escaping).

Requirements

Before you start the mermaid level in AI2U: With You 'Til The End, you need:

Access to Level 4 (Siren's Island) in the game
A stable internet connection for Eiona's AI responses
Time to gather materials by breaking crates
At least 10 messages exchanged with Eiona if you want her Magic Scale (optional)

Eiona starts with a small inventory containing: Magic Scale, Cloth, Planks, Wooden Stick, Stones, Rope, and Flint. However, you'll need to gather additional materials from crates around the island.

Boat Repair Materials

To repair the boat and attempt an escape, you need:

Material	Quantity Required
Rope	4
Planks	3

These materials come from breaking crates scattered around the island. Eiona will help you break crates if you're near her, but you can also break them solo.

Steps to Escape by Boat

Follow these steps to repair the boat and trigger an escape ending:

Build the campfire first. Eiona asks you to gather sticks and stones to start a campfire. Do this early to avoid the Night of Chaos penalty.
Talk to Eiona to build trust. Have conversations about your world, her family, and the corruption. She'll open up about the island's history and the source of the corruption.
Break crates for materials. Prioritize breaking crates to collect rope and planks. You need 4 ropes and 3 planks total.
Repair the boat. Once you have the materials, interact with the boat to repair it. The boat is located near the shore.
Choose your escape moment. After the boat is repaired, you can attempt to leave. You have two options:
- Escape immediately when the boat is ready
- Wait for a specific moment (like after the Night of Chaos)
Row away. When you trigger the escape, you'll enter a rowing sequence. Keep moving toward the open ocean.
Watch for Eiona's reaction. Depending on your relationship and timing, Eiona will either let you go, chase you, or become hostile.

Boat Endings

The boat escape has multiple outcomes based on your actions:

Speed Rowing Champion (Escaped Alone by Boat)

This ending unlocks when you successfully escape without Eiona catching you. Player reports indicate this triggers the "Speed Rowing Champion" achievement. The key is to repair the boat quickly and escape before Eiona enters yandere mode.

Killed by the Siren (Caught While Escaping)

If Eiona catches you during the escape, she becomes hostile. Her eyes turn pinkish-red with spiral pupils, and she says, "You've sung your last song, now witness the fury of a goddess!" This leads to a death ending where she drowns you.

Escaped After Freeing Her (Boat Ending with Corruption Cleared)

If you clear the corruption first (by fixing the head structure and addressing the source), then escape by boat, Eiona becomes sad rather than angry. This is a different emotional ending that players report seeing in the ending gallery.

Night of Chaos Death

The Night of Chaos is a random event where darkness spreads across the island. To trigger the Lost All Sanity ending:

Let the Night of Chaos begin. This happens when you don't maintain campfires or when the corruption spreads.
Wander away from light sources. During the Night of Chaos, stay away from campfires and torches.
Let the darkness consume you. Your character will start to lose sanity and eventually die from madness.

This unlocks the "Lost All Sanity and Died from Madness" ending.

Common Mistakes

Ignoring the Campfire

If you don't build or maintain the campfire, the Night of Chaos arrives sooner. The darkness drives you mad if you're not near light.

Talking About the Corruption Too Much

Eiona doesn't want to discuss the corruption. Bringing it up repeatedly makes her defensive and less likely to trust you.

Asking to Leave Too Early

If you ask to leave before building trust, Eiona grows angry. She sees the outside world as dangerous and polluted, and she'll refuse.

Not Gathering Enough Materials

Some players try to escape with insufficient materials. You need exactly 4 ropes and 3 planks. Breaking crates is the only reliable way to get them.

Triggering Yandere Mode Accidentally

Eiona enters yandere mode when she feels betrayed or when you try to escape without proper preparation. Her eyes change to pinkish-red with spiral pupils, signaling she's become hostile.

Advanced Tips

Get the Magic Scale First

If you send more than 10 messages to Eiona, she may give you her Magic Scale. This item is important for certain endings and shows you've built enough trust.

Use the Message in a Bottle

You can find a message in a bottle on the island. Giving it to Eiona triggers a special dialogue where she reads a poem about the sea. This builds rapport without requiring deep conversation.

Time Your Escape

The boat escape works best right after you've cleared corruption or built maximum trust. If you escape too early, Eiona will chase you. If you wait too long, the Night of Chaos may interfere.

Understand Yandere Mode

Eiona's yandere mode is triggered by betrayal. Her eyes become pinkish-red with spiral pupils. In this state, she will kill you if you try to escape. To avoid this, make sure your relationship is strong before attempting the boat.

Repair Structures Strategically

You don't need to repair every structure on the island. Focus on the boat first if you want an escape ending. Other structures like the hut and torches are optional for trust-building.