Mai/Plot

Guild Founding Arc
While Mai was arguing with Yui over if they should restarted their characters, Maple invited them to Maple Tree. Until Sally returned and connected the dots, they were cautious of Maple's intentions. After Mai and Yui joined Maple Tree, Maple and Sally soloed layer bosses and brought the twins up to the 3rd layer where they met the other members of Maple Tree.

Mai and Yui went grinding with Maple at the Labyrinth of the Poison Dragon to level up. The group went incognito with Maple in demon form and the twins wearing helmets. To make their dungeon runs more fun, they finished the runs as fast as they could and got a run under 2 minutes and 30 seconds. Their effort allowed Mai and Yui to learn [Conqueror] and [Destroyer].

Another day, Mai and Yui learned how to evade wind-up attacks (ie: penetrating attacks) from Sally.

Guild Competition Arc
During the 4th event, Mai and Yui defended Maple Tree's base for most of the event and their offensive power crushed countless invaders.

After Maple rushed to save Sally, the twins nearly kill Dred but they celebrate too early and die.

As a change of pace, the twins leave the base with Maple to attack other guilds. Mai and Yui crushed many players with Maple. After Mii returned to save the Kingdom of the Flame Emperor, the twins were sent into the sky on Syrup to protect them.

During the raid made by the Congregation of the Holy Swords, Mai and Yui were liabilities that were protected by Chrome. Near the end of the assault, they killed Frederica through her [Multi-Barrier].

Rulership Arc
Mai and Yui went with Maple to hunt ghost monsters for their quest. After Maple's [Loving Sacrifice] was sealed, she accidentally killed the twins and rushed to regroup with them.

While Maple was sick, Mai and the other members of Maple Tree advanced to the 5th layer without her.

Mai and Yui helped Maple kill the King of Light in about 4 pairs of attacks and learned the [Light Arrow] skill.

Tower Arc
Mai, Chrome, Iz, Kasumi, Kanade, and Yui worked together to climb the 7th event's tower. Mai and Yui's offensive power allowed them to overcome many obstacles with ease.

At the 5th floor, they had to change up their strategy and they were even separated. When they were separated from the others, the twins came up with a hammer typhoon strategy and mowed through the zombie horde. They safely passed through the mist and met up with the others before they easily defeated the boss.

When Maple and Sally had just finished the 7th floor, Mai and the others had already cleared the 9th floor and been defeated by the 10th floors' boss.

Companions Arc
Mai and Yui went searching for pets with Maple. Inside a forest, they spotted a bear cub but Maple wasn't fast enough to follow it. After Maple left, they twins learned about the bear cub and others monsters in the forest. During a break, Iz gave them some items to aid them. Their persistence allowed them to get bear cub monster companions. Later at the guild, the twins recolored their companions with items Iz gave them and they named their companions Tsukimi and Yukimi.

Eighth Event Arc
Mai and Yui participated in the 8th event. Mai and Tsukimi defeated many monsters and players together. After Yui noticed Maple's location on the map, she contact Mai and they met up near Maple's location before heading out together. It was implied that Yui had a similar experience to Mai.