火の鳥: A phoenix, more specifically as in Western mythology.

changing constantly

stairs, staircase / ladder, a series of steps to advancement to be followed in order

to run; to dash / to gallop (one's horse); to canter / to attack (as an army); to charge (esp. cavalry)

翔る, 駆ける: to soar; to fly / to run; to dash

rise, ascend, go up / go in, enter (a house) / get out (of a pool, etc.) / visit, call (on someone) / be promoted, go up (in social standing) / let up, come to an end / flare up (as in fire)

上がる: rise, go up / 挙がる: be cited / 揚がる: be fried / 和了る: (mahjong) to win

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend