nǐ
shì
shéi
Who are you?
you (informal, as opposed to courteous 您[nin2])

= + : Nefertiti and Rosa Luxemburg are sending you a peace dove inside the space station.
variant of 是[shi4] / (used in given names)
to be (followed by substantives only) / correct; right; true / (respectful acknowledgement of a command) very well / (adverb for emphatic assertion)

= + : Mnemonic symbol: a skull, from "to be or not to be".

Sherlock Holmes (sh) starts his day in the space station's bathroom (Ø4) with a mug of coffee (旦). Holding a skull (mnemonic symbol for 是) in his hands, he asks himself "to be, or not to be" (是). He wonders if he can make the skull come back to life using lots of coffee, and injects coffee from his mug into the skull using a syringe (龰).

= + + : Mnemonic symbol: a skull, from "to be or not to be".

Sherlock Holmes (sh) watches the Neanderthal Man (人) trying to climb to the sun (日) on a ladder (下) in the space station's bathroom (Ø4). Sherlock is afraid that he'll open the window, so he puts on a big skull (是) and scares him off.
who / also pr. [shui2]

= + : Just inside the Eiffel Tower's kitchen Sherlock Holmes stands proudly in front of an advertising column advertising his performance in the Eiffel Tower tonight. He is very upset as two sparrows fly by and ask each other, "这是谁?是谁?"