説明書

The only one. 唯一 is unique; 唯我独尊 is standing alone above all.

The orchid. One of the four plants of classical painting, standing for quiet nobility.

The hiragana え was made from 衣. Clothing in the old, plain sense. The shape is a robe with sleeves.

Thanks, and also apology — 感謝 and 謝罪 use the same character. Both are things you owe and then say.