she first appears in episode 3, after crashing into Ichigo. She walks off carring what looks like her 'friends' school bags/homework.
She later visits Cafe Mew Mew and explains to Ichigo that she belives that they are only taking out her anger on her and they will pour out their troubles one day and ask Lettuce for advice.
When Lettuce first transforms into a mew, she is vrey scared and begins attacking Ichigo and Minto, who then calm her down.
Through out the seris, she beocmes a lot more confident and she tries to tell Pai that the fight is getting them no-where.
FACTS
Lettuce gains a mermaid tail when near Mew Aqua
Lettuce is very clumsy!
lettuce has her birthfay on 29th april
Lettuce loves Ryou Shirogane :P
Lettuce has very green hair and eyes when a mew mew
Lettuce is infused with a finless porpoise