Here are 50 Raksha Bandhan captions for sisters:

1. "Tied together by love and a lifetime of memories. Happy Raksha Bandhan, sister! 
2. "To the sister who’s my forever partner in crime – Happy Rakhi! 
3. "Rakhi is just another excuse to celebrate our unbreakable bond. Love you, sis! 
4. "Sisters by chance, best friends by choice. Happy Raksha Bandhan! 
5. "You’re my first best friend and forever protector. Happy Rakhi! 
6. "Tying a knot of love, care, and endless memories. Happy Raksha Bandhan! 
7. "No matter where life takes us, we’ll always have each other. Happy Rakhi, sis! 
8. "Through thick and thin, we stand by each other. Happy Rakhi, my strong sister! 
9. "Here’s to the sister who’s always been my biggest supporter and secret-keeper. Happy Rakhi! 
10. "Sisterhood is the sweetest bond – Happy Raksha Bandhan! 
11. "Different paths, same hearts. Love you, sister. Happy Rakhi! 
12. "Rakhi is a thread that ties us closer every year. Love you loads, sis! 
13. "For the laughter, for the tears, and for the countless shared memories. Happy Raksha Bandhan!  Buy now:- Nazar na Lage Gift Box
14. "Sisters are angels in disguise. Happy Rakhi to my favorite one! 
15. "We may fight, but my love for you grows stronger every year. Happy Raksha Bandhan! 
16. "Our bond is eternal, just like this Rakhi. Love you, sis! 
17. "To the sister who’s both my rival and my best friend. Happy Raksha Bandhan! 
18. "Rakhi is a celebration of us, our love, and our endless support. Happy Rakhi! 
19. "You tie love, care, and endless joy into my life. Happy Raksha Bandhan! "
20. "From childhood fights to adult gossip, you’re my forever partner. Happy Rakhi, sis! "
21. "Cheers to the one who knows me best. Happy Raksha Bandhan, dear sister!"
22. "Tying a thread of love and a lifetime of care. Happy Rakhi, sis! "
23. "Because of you, I never face anything alone. Happy Raksha Bandhan!"
24. "To the sister who’s my biggest blessing and my forever best friend. Happy Rakhi!"
25. "A thread that’s tied with love and trust. Happy Raksha Bandhan, my dearest sis!"
26. "Here’s to the sister who knows all my secrets and still loves me. Happy Rakhi!" Buy now:- Spooky Ghost Mug
27. "Sisters: Different flowers from the same garden. Happy Raksha Bandhan!"
28. "For the one who’s always been my protector, no matter what. Happy Rakhi!"
29. "My sister is my forever friend, guide, and support system. Happy Raksha Bandhan! 
30. "Rakhi reminds me of all the sweet memories we share. Love you, sis! 
31. "Sisters make the world a brighter place. Happy Raksha Bandhan! 
32. "To the one who’s been there through it all – Happy Raksha Bandhan, sis! 
33. "A sister is both your mirror and your opposite. Happy Rakhi! 
34. "Through every high and low, we’ll always have each other. Happy Raksha Bandhan! 
35. "Our bond is beyond words, and this Rakhi just makes it stronger. Love you, sis! 
36. "Sisters are different flowers from the same garden. Happy Raksha Bandhan! 
37. "You’re the peanut butter to my jelly. Happy Rakhi, sis! 
38. "To the one who’s more than just a sister – Happy Raksha Bandhan! 
39. "Sisterhood: a bond that’s tied with love and sealed with trust. Happy Rakhi! 
40. "No matter how far we go, our hearts are always connected. Happy Raksha Bandhan, sis! 
41. "You’re not just my sister, but my best friend for life. Happy Raksha Bandhan! " Buy now:- Sunshine Mug
42. "Here’s to the one who’s always got my back. Happy Rakhi, sis! 
43. "Tied by love, strengthened by trust – Happy Raksha Bandhan, dear sister! 
44. "Sisters are like stars; you may not always see them, but you know they’re always there. Happy Rakhi! 
45. "Our bond is eternal, just like this Rakhi. Love you always, sis! 
46. "Through every fight, every laugh, and every tear – Happy Raksha Bandhan! 
47. "You’re my sister, my confidante, and my forever friend. Happy Rakhi! 
48. "Sisterhood is the sweetest blessing. Happy Raksha Bandhan! 
49. "Our bond is a thread of love and endless memories. Happy Rakhi, sis! 
50. "To my sister: You’re my sunshine on a cloudy day. Happy Raksha Bandhan! 

These captions capture the essence of sisterhood and the joy of celebrating Raksha Bandhan.

Conclusion:-

The festival highlights the values of love, respect, and family ties, transcending biological relationships and fostering unity. In modern times, Rakhi has evolved to embrace broader relationships, emphasizing the importance of care, protection, and mutual respect.