So back on my e-tickets, when I booked though TravelUp's website, I was able to register our names with full characters in the booking. However, when I received my e-tickets, some of our names where put in initials! For example, let say my name is 'Sarah Sue Ann binti Muhammad', the name on my e-tickets were shown as 'Sarah S A binti Muhammad'. I immediately emailed the agent again, and this was their reply.
I swear I was having anxiety for a couple of months, I tried 'google'-ing for peoples experience, I tried contacting Saudia's office in Kuala Lumpur (which surprisingly they don't have one?). I emailed Saudia's website customer service and they weren't very helpful. They ask me to liaise with the travel agent as they only tend to matters for tickets purchase through their website. So after a few months of stress, I decided to have faith and just hope everything went well -- and it did! Yeay.
Alhamdulillah, everything was fine, we went to London and arrived back safety in Kuala Lumpur without any issues with the tickets. So for those of you who are reading this and stressing out over your name on e-tickets, rest assure that as long as your first name and last name is stated on the tickets, the names in between can be in initials.
So in my case, Sarah Sue Ann binti Muhammad - Sarah S A binti Muhammad was ok. P/s: bukan nama sebenar hehe.
This is based on my experience on Saudia though, can't speak for other airlines because I usually have my name in full on the tickets