It Is A Start

So, Jonas is an AI powered robot. It should be remarkably apparent, and it's not something he hides. So, with being a robot there comes a whole slew of abilities and what not. One of those "abilities" is record keeping. He has records of preeeetty much anything that exists in the Marvel universe, including things like history, heroes, organizations, etc. etc. He has thousands of files and there is no doubt one for any superpowered being that hasn't remained hidden. Obviously these are going to be more thorough when it comes to those on the Avengers teams, but considering how he can access files from any computer anywhere in the world.

Tl;dr Jonas knows stuff about your (Marvel) character, and he can store data about your (non-Marvel character) for record-keeping.

Now, with things like alternate universes (MCU vs Cartoons vs 616 vs Ultimates, so on and so forth), the records he have will exist for the character, even if they're inaccurate to the 'verse your character is fun. (Example: his files on Captain America will be strictly 616-canon, and thus wildly different from MCU Cap's history.) This can obviously lead to a lot of confusion and stepping on toes, so I'm giving you the option to yay or nay Jonas' knowledge of your character/their 616 counterpart. We can say his files were corrupted or deleted during his transfer to Luceti.

You can also yay or nay his record keeping of your non-Marvel character, or non-616 character.