well I want Rin to be older =)) because that makes Len a siscon

It says rin is older in Alice of Human Sacrifice

IT IS A FACT!

I thought the voicebank Rin was recorded/made first, so I Just assume that Rin is older.

I seem alone on this. I see Len as older, more sensible, but gets embarrassed and/or angry way too easily. Rin's the little sister who likes making fun of him a lot.

Also,
@every saying it's a fact
Nope. Crypton never specified anything other than that they're 14. And how tall they are. And their weight. Rin can just as normally be younger.

because it seems that Len is more mature! ;-P

I just think it would be cuter if Len was older. More of a protector. Is you know what I mean. Older brother protects younger sister..? Yeah haha.

He seems younger...just his voice, you know? Rin's seems a little more mature, and Rin is like the older sister who teases the younger brother...you know? Eh, dunno how to explain it, but Rin's older, got it? >.<

Umm..... reading all the comments, I'm on both sides. Either way is cute!! >.<

Len may be taller and everything (since he's a boy) but I like to think of Rin as the older "twin" because she was created first. Since there was nothing officially stated about either one being "older", I will always see Rin as the older one.

I don't sure, sometimes I also think Rin is older :P
But I think Rin is more childish than Len, and I see that Len really protective so I choose this one

Even if Rin is created first,CFM doesn't give a statement about this.....Neither of them are older than the other one because they are MIRROR IMAGES....

Rin's voicebank are created first

I kinda see Len as a annoying and sometimes clingy little brother and rin is the older sister who has to deal with him all the time XD