About the #character "Χ":
- Codepoint: U+03A7
- Name: Greek Capital Letter Chi
- Block: Greek and Coptic
- Version: 1.1
- HTML: &#03A7;
- CSS: \0003A7
- JS: \u03A7

More info: https://unicodeplus.com/U+03A7

About the #character "📚":
- Codepoint: U+1F4DA
- Name: Books
- Block: Miscellaneous Symbols and Pictographs
- Version: 6
- HTML: &#1F4DA;
- CSS: \01F4DA
- JS: \u1F4DA

More info: https://unicodeplus.com/U+1F4DA

About the #character "⇑":
- Codepoint: U+21D1
- Name: Upwards Double Arrow
- Block: Arrows
- Version: 1.1
- HTML: &#21D1;
- CSS: \0021D1
- JS: \u21D1

More info: https://unicodeplus.com/U+21D1

About the #character "→":
- Codepoint: U+2192
- Name: Rightwards Arrow
- Block: Arrows
- Version: 1.1
- HTML: ࢐
- CSS: \002192
- JS: \u2192

More info: https://unicodeplus.com/U+2192

About the #character "➁":
- Codepoint: U+2781
- Name: Dingbat Circled Sans-Serif Digit Two
- Block: Dingbats
- Version: 1.1
- HTML: ૝
- CSS: \002781
- JS: \u2781

More info: https://unicodeplus.com/U+2781

About the #character "❼":
- Codepoint: U+277C
- Name: Dingbat Negative Circled Digit Seven
- Block: Dingbats
- Version: 1.1
- HTML: &#277C;
- CSS: \00277C
- JS: \u277C

More info: https://unicodeplus.com/U+277C

About the #character "О":
- Codepoint: U+041E
- Name: Cyrillic Capital Letter O
- Block: Cyrillic
- Version: 1.1
- HTML: &#041E;
- CSS: \00041E
- JS: \u041E

More info: https://unicodeplus.com/U+041E

About the #character "😼":
- Codepoint: U+1F63C
- Name: Cat Face With Wry Smile
- Block: Emoticons
- Version: 6
- HTML: &#1F63C;
- CSS: \01F63C
- JS: \u1F63C

More info: https://unicodeplus.com/U+1F63C

About the #character "Κ":
- Codepoint: U+039A
- Name: Greek Capital Letter Kappa
- Block: Greek and Coptic
- Version: 1.1
- HTML: &#039A;
- CSS: \00039A
- JS: \u039A

More info: https://unicodeplus.com/U+039A

About the #character "y":
- Codepoint: U+0079
- Name: Latin Small Letter Y
- Block: Basic Latin
- Version: 1.1
- HTML: O
- CSS: \000079
- JS: \u0079

More info: https://unicodeplus.com/U+0079