yes Kira has a sister. Later in the series it is revealed that Cagalli is Kira's twin sister.
mobile suit gundam seed and mobile suit gundam seed destiny
Kira
Episode 54
By Yamato, I presume you mean Kira from Gundam seed / Destiny. In Gundam seed, he is 16 years old and in Gundam seed DESTINY, which is the second second, he is 18. Hope it helped.
- -'' its the mobile suit that kira is pilotting - -
Yes, Kira and Cagalli are revealed to be twins, raised seperately.
At the end of Gundam Seed episode 7, The Scar of Space. She's rescued from a life pod by Kira.
gundam seed is the previous set and gundam seed destiny is the one after gundam seed
5 Gundam Seed, Gundam Seed Astray,Gundam Seed vs Astray,Gundam Seed Destiny, and Gundam Seed Stargazer.
Gundam SEED Destiny Episode 26 The Promise
"Born as a Coordinator, Kira's advanced mental and physical skills allow him to skillfully control the Strike." from My Anime List.
There is no gundam series called gundam seed 00. However, there is Gundam Seed, and Gundam 00.