Currently Unicode chars works in From name and in the Subject Line

Unicode chars can be inserted currently via copy/paste

Here are examples of Unicode pictographs:
​https://unicode-table.com/en/sets/flowers-symbols/
​https://unicode-table.com/en/sets/emoji/
​https://unicode-table.com/en/blocks/miscellaneous-symbols-and-pictographs/
​https://unicode-table.com/en/blocks/miscellaneous-symbols/
​