We got ours professionaly cleaned, and that didnt get it all off, but my darling child used permanent marker, not biro.

I have successfully gotten biro off the faux suede couch using windex and a sponge.
What colour is your couch? Ours is chocolate (the one the biro got one - the texta was on cream ) but all the biro came off.

If you are hesitant to use windex cos of the blue colour - I know I was - and you have throw cushions you could try it out on those frst, or on the back of the couch in a small part that no one will see.