What do we know about Princess Bubblegum? Is she really as sweet as she looks or is she something else? Give evidence on her past or give a good theory on what her past might be.
PB can speak German, which she has at least 4 times in the series. She said "Ich bin hier," (I am here), and, "Ich bin so gluechlich! Ich kante, ich kante-" (I am so happy! I can't, I can't-) in What Have You Done, "Auf Wiedersehen" (goodbye) to Finn over the phone in Go With Me, and she counted in german from 35 to 41, "fuenfunddreissig, sechsunddreissig [...] einsundvierzig" in Stakes, Part 7: Checkmate. She also had a sign in front of her house the read "Willkommen" (welcome) in Bonnibel Bubblegum.
PB also have some sort of past with Marceline since she knows Marceline in "Go With Me" and Marceline even gave her a shirt that the Door Lord stole which means it is very valuable for her in "What Was Missing."
I think that PB must have some German decent because Earl of Lemongrab has a somewhat European accent. Plus, PB also speaks it. So she could have "immigrated" from Germany to Ooo.
Her reign in the kingdom must be short because she is 18 and as the Earl of Lemongrab stated, you must be 18 to be princess. So she could have came over shortly before her 18th birthday.
She probably made Earl because she was lonely in the castle but ended up making a mistake, she is apparently too busy in her expiriments to realize that she is lonely.
She might be Betty,Simon's girlfriend, she has a mix of Hu
man DNA and Bubblegum and i have evidence: