EDIT Bulgarian Cyrillic Bulgarian Cyrillic is different from the conventional, Russian Cyrillic. That difference applies to the lowercase letters, which are not a mini version of the capital letter but have their own distinguished shapes which derive from hand-writing. Those shapes are more recognizable and rounded. That roundness breaks the rigid verticality, so typical for the Cyrillic and creates more mild and appealing rhythm. That rounded shapes of the letters, together with bigger number of ascenders and descenders, also increases the legibility and makes the text block more stable and homogeneous.

EDIT Unicode blocks
There are four Unicode blocks covering Cyrillic:
U+0400U+04FF Cyrillic
U+0500U+052F Cyrillic Supplement
U+2DE0U+2DFF Cyrillic Extended-A
U+A640U+A69F Cyrillic Extended-B

 
U+0400U+0401U+0402U+0403U+0404U+0405U+0406U+0407U+0408U+0409U+040AU+040BU+040CU+040DU+040EU+040FU+0410U+0411U+0412U+0413U+0414U+0415U+0416U+0417U+0418U+0419U+041AU+041BU+041CU+041DU+041EU+041FU+0420U+0421U+0422U+0423U+0424U+0425U+0426U+0427U+0428U+0429U+042AU+042BU+042CU+042DU+042EU+042FU+0430U+0431U+0432U+0433U+0434U+0435U+0436U+0437U+0438U+0439U+043AU+043BU+043CU+043DU+043EU+043FU+0440U+0441U+0442U+0443U+0444U+0445U+0446U+0447U+0448U+0449U+044AU+044BU+044CU+044DU+044EU+044FU+0450U+0451U+0452U+0453U+0454U+0455U+0456U+0457U+0458U+0459U+045AU+045BU+045CU+045DU+045EU+045FU+0460U+0461U+0462U+0463U+0464U+0465U+0466U+0467U+0468U+0469U+046AU+046BU+046CU+046DU+046EU+046FU+0470U+0471U+0472U+0473U+0474U+0475U+0476U+0477U+0478U+0479U+047AU+047BU+047CU+047DU+047EU+047FU+0480U+0481U+0482U+0483U+0484U+0485U+0486U+0487 NOT ASSIGNEDU+0488U+0489U+048AU+048BU+048CU+048DU+048EU+048FU+0490U+0491U+0492U+0493U+0494U+0495U+0496U+0497U+0498U+0499U+049AU+049BU+049CU+049DU+049EU+049FU+04A0U+04A1U+04A2U+04A3U+04A4U+04A5U+04A6U+04A7U+04A8U+04A9U+04AAU+04ABU+04ACU+04ADU+04AEU+04AFU+04B0U+04B1U+04B2U+04B3U+04B4U+04B5U+04B6U+04B7U+04B8U+04B9U+04BAU+04BBU+04BCU+04BDU+04BEU+04BFU+04C0U+04C1U+04C2U+04C3U+04C4U+04C5U+04C6U+04C7U+04C8U+04C9U+04CAU+04CBU+04CCU+04CDU+04CEU+04CFU+04D0U+04D1U+04D2U+04D3U+04D4U+04D5U+04D6U+04D7U+04D8U+04D9U+04DAU+04DBU+04DCU+04DDU+04DEU+04DF
U+0400 CYRILLIC CAPITAL LETTER IE WITH GRAVE
U+0401 CYRILLIC CAPITAL LETTER IO
U+0402 CYRILLIC CAPITAL LETTER DJE
U+0403 CYRILLIC CAPITAL LETTER GJE
U+0404 CYRILLIC CAPITAL LETTER UKRAINIAN IE
U+0405 CYRILLIC CAPITAL LETTER DZE
U+0406 CYRILLIC CAPITAL LETTER BYELORUSSIAN-UKRAINIAN I
U+0407 CYRILLIC CAPITAL LETTER YI
U+0408 CYRILLIC CAPITAL LETTER JE
U+0409 CYRILLIC CAPITAL LETTER LJE
U+040A CYRILLIC CAPITAL LETTER NJE
U+040B CYRILLIC CAPITAL LETTER TSHE
U+040C CYRILLIC CAPITAL LETTER KJE
U+040D CYRILLIC CAPITAL LETTER I WITH GRAVE
U+040E CYRILLIC CAPITAL LETTER SHORT U
U+040F CYRILLIC CAPITAL LETTER DZHE
U+0410 CYRILLIC CAPITAL LETTER A
U+0411 CYRILLIC CAPITAL LETTER BE
U+0412 CYRILLIC CAPITAL LETTER VE
U+0413 CYRILLIC CAPITAL LETTER GHE
U+0414 CYRILLIC CAPITAL LETTER DE
U+0415 CYRILLIC CAPITAL LETTER IE
U+0416 CYRILLIC CAPITAL LETTER ZHE
U+0417 CYRILLIC CAPITAL LETTER ZE
U+0418 CYRILLIC CAPITAL LETTER I
U+0419 CYRILLIC CAPITAL LETTER SHORT I
U+041A CYRILLIC CAPITAL LETTER KA
U+041B CYRILLIC CAPITAL LETTER EL
U+041C CYRILLIC CAPITAL LETTER EM
U+041D CYRILLIC CAPITAL LETTER EN
U+041E CYRILLIC CAPITAL LETTER O
U+041F CYRILLIC CAPITAL LETTER PE
U+0420 CYRILLIC CAPITAL LETTER ER
U+0421 CYRILLIC CAPITAL LETTER ES
U+0422 CYRILLIC CAPITAL LETTER TE
U+0423 CYRILLIC CAPITAL LETTER U
U+0424 CYRILLIC CAPITAL LETTER EF
U+0425 CYRILLIC CAPITAL LETTER HA
U+0426 CYRILLIC CAPITAL LETTER TSE
U+0427 CYRILLIC CAPITAL LETTER CHE
U+0428 CYRILLIC CAPITAL LETTER SHA
U+0429 CYRILLIC CAPITAL LETTER SHCHA
U+042A CYRILLIC CAPITAL LETTER HARD SIGN
U+042B CYRILLIC CAPITAL LETTER YERU
U+042C CYRILLIC CAPITAL LETTER SOFT SIGN
U+042D CYRILLIC CAPITAL LETTER E
U+042E CYRILLIC CAPITAL LETTER YU
U+042F CYRILLIC CAPITAL LETTER YA
U+0430 CYRILLIC SMALL LETTER A
U+0431 CYRILLIC SMALL LETTER BE
U+0432 CYRILLIC SMALL LETTER VE
U+0433 CYRILLIC SMALL LETTER GHE
U+0434 CYRILLIC SMALL LETTER DE
U+0435 CYRILLIC SMALL LETTER IE
U+0436 CYRILLIC SMALL LETTER ZHE
U+0437 CYRILLIC SMALL LETTER ZE
U+0438 CYRILLIC SMALL LETTER I
U+0439 CYRILLIC SMALL LETTER SHORT I
U+043A CYRILLIC SMALL LETTER KA
U+043B CYRILLIC SMALL LETTER EL
U+043C CYRILLIC SMALL LETTER EM
U+043D CYRILLIC SMALL LETTER EN
U+043E CYRILLIC SMALL LETTER O
U+043F CYRILLIC SMALL LETTER PE
U+0440 CYRILLIC SMALL LETTER ER
U+0441 CYRILLIC SMALL LETTER ES
U+0442 CYRILLIC SMALL LETTER TE
U+0443 CYRILLIC SMALL LETTER U
U+0444 CYRILLIC SMALL LETTER EF
U+0445 CYRILLIC SMALL LETTER HA
U+0446 CYRILLIC SMALL LETTER TSE
U+0447 CYRILLIC SMALL LETTER CHE
U+0448 CYRILLIC SMALL LETTER SHA
U+0449 CYRILLIC SMALL LETTER SHCHA
U+044A CYRILLIC SMALL LETTER HARD SIGN
U+044B CYRILLIC SMALL LETTER YERU
U+044C CYRILLIC SMALL LETTER SOFT SIGN
U+044D CYRILLIC SMALL LETTER E
U+044E CYRILLIC SMALL LETTER YU
U+044F CYRILLIC SMALL LETTER YA
U+0450 CYRILLIC SMALL LETTER IE WITH GRAVE
U+0451 CYRILLIC SMALL LETTER IO
U+0452 CYRILLIC SMALL LETTER DJE
U+0453 CYRILLIC SMALL LETTER GJE
U+0454 CYRILLIC SMALL LETTER UKRAINIAN IE
U+0455 CYRILLIC SMALL LETTER DZE
U+0456 CYRILLIC SMALL LETTER BYELORUSSIAN-UKRAINIAN I
U+0457 CYRILLIC SMALL LETTER YI
U+0458 CYRILLIC SMALL LETTER JE
U+0459 CYRILLIC SMALL LETTER LJE
U+045A CYRILLIC SMALL LETTER NJE
U+045B CYRILLIC SMALL LETTER TSHE
U+045C CYRILLIC SMALL LETTER KJE
U+045D CYRILLIC SMALL LETTER I WITH GRAVE
U+045E CYRILLIC SMALL LETTER SHORT U
U+045F CYRILLIC SMALL LETTER DZHE
U+0460 CYRILLIC CAPITAL LETTER OMEGA
U+0461 CYRILLIC SMALL LETTER OMEGA
U+0462 CYRILLIC CAPITAL LETTER YAT
U+0463 CYRILLIC SMALL LETTER YAT
U+0464 CYRILLIC CAPITAL LETTER IOTIFIED E
U+0465 CYRILLIC SMALL LETTER IOTIFIED E
U+0466 CYRILLIC CAPITAL LETTER LITTLE YUS
U+0467 CYRILLIC SMALL LETTER LITTLE YUS
U+0468 CYRILLIC CAPITAL LETTER IOTIFIED LITTLE YUS
U+0469 CYRILLIC SMALL LETTER IOTIFIED LITTLE YUS
U+046A CYRILLIC CAPITAL LETTER BIG YUS
U+046B CYRILLIC SMALL LETTER BIG YUS
U+046C CYRILLIC CAPITAL LETTER IOTIFIED BIG YUS
U+046D CYRILLIC SMALL LETTER IOTIFIED BIG YUS
U+046E CYRILLIC CAPITAL LETTER KSI
U+046F CYRILLIC SMALL LETTER KSI
U+0470 CYRILLIC CAPITAL LETTER PSI
U+0471 CYRILLIC SMALL LETTER PSI
U+0472 CYRILLIC CAPITAL LETTER FITA
U+0473 CYRILLIC SMALL LETTER FITA
U+0474 CYRILLIC CAPITAL LETTER IZHITSA
U+0475 CYRILLIC SMALL LETTER IZHITSA
U+0476 CYRILLIC CAPITAL LETTER IZHITSA WITH DOUBLE GRAVE ACCENT
U+0477 CYRILLIC SMALL LETTER IZHITSA WITH DOUBLE GRAVE ACCENT
U+0478 CYRILLIC CAPITAL LETTER UK
U+0479 CYRILLIC SMALL LETTER UK
U+047A CYRILLIC CAPITAL LETTER ROUND OMEGA
U+047B CYRILLIC SMALL LETTER ROUND OMEGA
U+047C CYRILLIC CAPITAL LETTER OMEGA WITH TITLO
U+047D CYRILLIC SMALL LETTER OMEGA WITH TITLO
U+047E CYRILLIC CAPITAL LETTER OT
U+047F CYRILLIC SMALL LETTER OT
U+0480 CYRILLIC CAPITAL LETTER KOPPA
U+0481 CYRILLIC SMALL LETTER KOPPA
U+0482 CYRILLIC THOUSANDS SIGN
U+0483 COMBINING CYRILLIC TITLO
U+0484 COMBINING CYRILLIC PALATALIZATION
U+0485 COMBINING CYRILLIC DASIA PNEUMATA
U+0486 COMBINING CYRILLIC PSILI PNEUMATA
U+0487 
U+0488 COMBINING CYRILLIC HUNDRED THOUSANDS SIGN
U+0489 COMBINING CYRILLIC MILLIONS SIGN
U+048A CYRILLIC CAPITAL LETTER SHORT I WITH TAIL
U+048B CYRILLIC SMALL LETTER SHORT I WITH TAIL
U+048C CYRILLIC CAPITAL LETTER SEMISOFT SIGN
U+048D CYRILLIC SMALL LETTER SEMISOFT SIGN
U+048E CYRILLIC CAPITAL LETTER ER WITH TICK
U+048F CYRILLIC SMALL LETTER ER WITH TICK
U+0490 CYRILLIC CAPITAL LETTER GHE WITH UPTURN
U+0491 CYRILLIC SMALL LETTER GHE WITH UPTURN
U+0492 CYRILLIC CAPITAL LETTER GHE WITH STROKE
U+0493 CYRILLIC SMALL LETTER GHE WITH STROKE
U+0494 CYRILLIC CAPITAL LETTER GHE WITH MIDDLE HOOK
U+0495 CYRILLIC SMALL LETTER GHE WITH MIDDLE HOOK
U+0496 CYRILLIC CAPITAL LETTER ZHE WITH DESCENDER
U+0497 CYRILLIC SMALL LETTER ZHE WITH DESCENDER
U+0498 CYRILLIC CAPITAL LETTER ZE WITH DESCENDER
U+0499 CYRILLIC SMALL LETTER ZE WITH DESCENDER
U+049A CYRILLIC CAPITAL LETTER KA WITH DESCENDER
U+049B CYRILLIC SMALL LETTER KA WITH DESCENDER
U+049C CYRILLIC CAPITAL LETTER KA WITH VERTICAL STROKE
U+049D CYRILLIC SMALL LETTER KA WITH VERTICAL STROKE
U+049E CYRILLIC CAPITAL LETTER KA WITH STROKE
U+049F CYRILLIC SMALL LETTER KA WITH STROKE
U+04A0 CYRILLIC CAPITAL LETTER BASHKIR KA
U+04A1 CYRILLIC SMALL LETTER BASHKIR KA
U+04A2 CYRILLIC CAPITAL LETTER EN WITH DESCENDER
U+04A3 CYRILLIC SMALL LETTER EN WITH DESCENDER
U+04A4 CYRILLIC CAPITAL LIGATURE EN GHE
U+04A5 CYRILLIC SMALL LIGATURE EN GHE
U+04A6 CYRILLIC CAPITAL LETTER PE WITH MIDDLE HOOK
U+04A7 CYRILLIC SMALL LETTER PE WITH MIDDLE HOOK
U+04A8 CYRILLIC CAPITAL LETTER ABKHASIAN HA
U+04A9 CYRILLIC SMALL LETTER ABKHASIAN HA
U+04AA CYRILLIC CAPITAL LETTER ES WITH DESCENDER
U+04AB CYRILLIC SMALL LETTER ES WITH DESCENDER
U+04AC CYRILLIC CAPITAL LETTER TE WITH DESCENDER
U+04AD CYRILLIC SMALL LETTER TE WITH DESCENDER
U+04AE CYRILLIC CAPITAL LETTER STRAIGHT U
U+04AF CYRILLIC SMALL LETTER STRAIGHT U
U+04B0 CYRILLIC CAPITAL LETTER STRAIGHT U WITH STROKE
U+04B1 CYRILLIC SMALL LETTER STRAIGHT U WITH STROKE
U+04B2 CYRILLIC CAPITAL LETTER HA WITH DESCENDER
U+04B3 CYRILLIC SMALL LETTER HA WITH DESCENDER
U+04B4 CYRILLIC CAPITAL LIGATURE TE TSE
U+04B5 CYRILLIC SMALL LIGATURE TE TSE
U+04B6 CYRILLIC CAPITAL LETTER CHE WITH DESCENDER
U+04B7 CYRILLIC SMALL LETTER CHE WITH DESCENDER
U+04B8 CYRILLIC CAPITAL LETTER CHE WITH VERTICAL STROKE
U+04B9 CYRILLIC SMALL LETTER CHE WITH VERTICAL STROKE
U+04BA CYRILLIC CAPITAL LETTER SHHA
U+04BB CYRILLIC SMALL LETTER SHHA
U+04BC CYRILLIC CAPITAL LETTER ABKHASIAN CHE
U+04BD CYRILLIC SMALL LETTER ABKHASIAN CHE
U+04BE CYRILLIC CAPITAL LETTER ABKHASIAN CHE WITH DESCENDER
U+04BF CYRILLIC SMALL LETTER ABKHASIAN CHE WITH DESCENDER
U+04C0 CYRILLIC LETTER PALOCHKA
U+04C1 CYRILLIC CAPITAL LETTER ZHE WITH BREVE
U+04C2 CYRILLIC SMALL LETTER ZHE WITH BREVE
U+04C3 CYRILLIC CAPITAL LETTER KA WITH HOOK
U+04C4 CYRILLIC SMALL LETTER KA WITH HOOK
U+04C5 CYRILLIC CAPITAL LETTER EL WITH TAIL
U+04C6 CYRILLIC SMALL LETTER EL WITH TAIL
U+04C7 CYRILLIC CAPITAL LETTER EN WITH HOOK
U+04C8 CYRILLIC SMALL LETTER EN WITH HOOK
U+04C9 CYRILLIC CAPITAL LETTER EN WITH TAIL
U+04CA CYRILLIC SMALL LETTER EN WITH TAIL
U+04CB CYRILLIC CAPITAL LETTER KHAKASSIAN CHE
U+04CC CYRILLIC SMALL LETTER KHAKASSIAN CHE
U+04CD CYRILLIC CAPITAL LETTER EM WITH TAIL
U+04CE CYRILLIC SMALL LETTER EM WITH TAIL
U+04CF CYRILLIC SMALL LETTER PALOCHKA
U+04D0 CYRILLIC CAPITAL LETTER A WITH BREVE
U+04D1 CYRILLIC SMALL LETTER A WITH BREVE
U+04D2 CYRILLIC CAPITAL LETTER A WITH DIAERESIS
U+04D3 CYRILLIC SMALL LETTER A WITH DIAERESIS
U+04D4 CYRILLIC CAPITAL LIGATURE A IE
U+04D5 CYRILLIC SMALL LIGATURE A IE
U+04D6 CYRILLIC CAPITAL LETTER IE WITH BREVE
U+04D7 CYRILLIC SMALL LETTER IE WITH BREVE
U+04D8 CYRILLIC CAPITAL LETTER SCHWA
U+04D9 CYRILLIC SMALL LETTER SCHWA
U+04DA CYRILLIC CAPITAL LETTER SCHWA WITH DIAERESIS
U+04DB CYRILLIC SMALL LETTER SCHWA WITH DIAERESIS
U+04DC CYRILLIC CAPITAL LETTER ZHE WITH DIAERESIS
U+04DD CYRILLIC SMALL LETTER ZHE WITH DIAERESIS
U+04DE CYRILLIC CAPITAL LETTER ZE WITH DIAERESIS
U+04DF CYRILLIC SMALL LETTER ZE WITH DIAERESIS
CHARACTER  < BLOCK >  1 2 
U+0400 – U+04FF Cyrillic
DEUTSCH : ENGLISH