Single-person spacecraft

[1] The concept has been used in science fiction and actual ships[1] such as the Mercury capsule, Vostok and some suborbital designs.

[1] Highly compact single-person spacecraft have been considered by ISS for EVA work, to avoid having to go through the decompression needed to use the lower-pressure space suits.

[9] NASA developed a body-shaped single person spacecraft called FlexCraft, with the idea of allowing more and shorter EVA.

[9] The spacecraft would be at the same atmospheric pressure as the ISS, thus removing the medical stress and time needed to decompress and compress, and the danger of the bends.

[11] This design has a hatch at the bottom that an astronaut could enter into, but it would be at full pressure thus avoiding the need to purge nitrogen from the body for low-pressure suits.

Von Braun holds a model of a bottle-suit also called a single person spacecraft
Personal Rescue Enclosure is the ball on the left
NASA AX-5 hard space suit
The Shuttle EMU coupled with the manned maneuvering unit enable untethered omnidirectional spaceflight for one
Shepard in his Mercury space suit and helmet, with tubes connected.
Alan Shepard in the Freedom 7 capsule before launch
Cutaway diagram-art of the Mercury orbital spacecraft
X-15A2, with sealed ablative coating and external fuel tanks for a high-altitude rocket flight