KANJI GUIDE
The only one. 唯一 is unique; 唯我独尊 is standing alone above all.
The hiragana え was made from 衣. Clothing in the old, plain sense. The shape is a robe with sleeves.
Long life, and the celebration of it. The character on wedding envelopes and New Year food.
An old character for a person with nothing held back or hidden.