What I see that makes Lyger's theme unique is that it's actually based on an anime J-POP song which is called 'Ikari no jyuushin'
[The Anger of the Beast ***], it's sung by Hiroki, Yumi who also sung the second entrance theme of this Nagoya TV anime.
Actually, I like the fact that Sunrise meant for Lyger to be a biological like mecha like those mechas you see in the Kidou Senshi Gundam series. ^____^
I like the whole song which goes somthing like..
Moyose Moyose
ashita ni hashire...
[Burning Burning... Run into Tommorow]
Ikari no honoo ga ten o tsuki yaburu...
[The rage of the flame, while striking the sky]
Raigaa Soodo!...
[Lyger Sword]
Raigaa Surasshu!...
[Lyger Slash!]
Actually I know the whole song since I found the lyrics on a Japanese site.
Anyways, you know where I'm getting at and I don't know why
Lyger's not using this wicked song as his entrance theme. ^^;