Otto

Otto (オットー) is a human resident of Spagonia who appears in Sonic Unleashed. He is the landlord of the students' apartment building at Spagonia University, a teacher at Spagonia University and an old friend of Professor Pickle. He knows practically everything about his students and takes great pride in that. Due to knowing his students so well, he has a knack for bringing the right members of his students together as a couple.

Directory
''Landlord of the student apartment building. Otto has an uncanny knack for pegging which of his tenants has a thing for whom, but sometimes all the love in the air leaves him a bit choked up for his own youthful romances.''

PS3/Xbox360
Apparently, over 80 years prior to Sonic Unleashed, Otto befriended Professor Pickle and they have since then remained good friends. Around this time, Otto became the dominator of Spagonia University and had since then taken care of it. While working at Spagonia University, Otto always focused on learning all about his students and helped bringing many of his lovesick students together with the right partner over the years; one of these couples was Lilli's grandmother and grandfather. It has also been hinted that during his youth, Otto had his own fair share of romances.

Otto first appeared in the game when Sonic the Hedgehog and Chip came to Spagonia to find Professor Pickle. As the duo was searching for Spagonia University, they met Otto and greeted him. Pleased with their polite greeting, Otto told them how much he appreciate it and told them about how he takes pride in knowing everything about his students. He soon after met up with Sonic and Chip again, but was shocked to hear that Professor Pickle had been kidnapped by Dr. Eggman.

After Sonic, Chip and Tails had rescued Professor Pickle and had laid a plan of action, Otto ran into Sonic and Chip and heard how they planned to restore the Earth with a temple and an emerald. Otto responded by telling Sonic that he hoped what he was doing, because he himself had no idea about what was going on.

While Sonic and Chip restored Mazuri's continent, Otto began to learn about what was happening and eventually understood Sonic's task. From then on, whenever Sonic and Chip would pass through Spagonia, Otto would provide hints to where they would have to go next on their journey. Whenever Sonic questioned how he knew where they should go next, Otto explained that as dorm master, it is his duty to help young people.

During the story, Otto noticed that the shy and lonely Dora was longing for a boyfriend. He tried to encourage her to let go of her shyness, but to no avail. As such, he assigned David, who was looking for a girlfriend to start a family with, to cheer Dora up, with the intention of bringing them together as a couple. His plan eventually proved to be an success.

PS2/Wii
On the PS2/Wii version of Sonic Unleashed, Otto is one of the guardians of Spagonia's Gaia Temple with Lucia. His job is to both guard the temple and the Gaia Gate and lead the ones who are worthy to enter the Gate. On this version it is revealed that Otto was the one who inspired Professor Pickle to start out on his career. Despite their friendship, however, Otto never revealed to Professor Pickle that he was a temple guardian.

Otto first appeared in Sonic Unleashed when Sonic the Werehog and Chip returned from restoring Mazuri's continent. Upon seeing Sonic's Werehog form, Otto became rather shocked and confused at this "hairy beast", but could then quickly afterward see that it was Sonic. He then told him that he should not scare him like that as he could him a heart attack. Later, as Sonic and Chip was looking for directions to the local Sacred Shrine, Otto told them that he could recall there was a shrine somewhere, but he could not remember where, and noted that he had become rather forgetful lately.

Some time later, Otto meets with Sonic and Chip again. He noticed that they had gotten the Moon Tablet from Lucia and was surprised to hear that they had already passed through the Gaia Gate. When he heard this, Otto started to think that Sonic and Chip were worthy enough to enter the temple. Convinced, Otto willingly gave them the Sun Tablet to allow them to proceed through the Gaia Gate, and explained to them his and Lucia's role as Gaia Temple guardians. Afterwards, Otto encouraged Sonic and Chip to find the Gaia Temple and stop Dark Gaia for good.

Soon afterwards, Otto was approached by Sonic and Chip again. Expecting that Sonic and Chip had learned about the Planet Tablets from Professor Pickle, Otto asked kindly for their collected tablet fragments and assembled them to a Planet Tablet that granted Sonic and Chip access to the Gaia Temple.